2020-09-19

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Indian Railways

India’s national railway system is operated by the Ministry of Railways. It is run by the government as a public good and manages the fourth largest railway network in the world by size, with a route length of 95,981-kilometre (59,640 mi) as of March 2019. About 61.62% of the routes are electrified with 25 kV 50 Hz AC electric traction while 33% of them are double or multi-tracked.

In the fiscal year ending March 2018, IR carried 8.26 billion passengers and transported 1.16 billion tonnes of freight. In the fiscal year 2017–18, IR is projected to have revenue of ₹1.874 trillion (US$26 billion), consisting of ₹1.175 trillion (US$16 billion) in freight revenue and ₹501.25 billion (US$7.0 billion) in passenger revenue, with an operating ratio of 96.0 percent.

What could be the factors that matter for the railways industry? It will be in their best interests to ensure that the trains are safe and comfortable for regular use, while also having a long lifetime. Sealants and adhesives play a lesser-known but highly significant role while manufacturing a train that meets these broad criteria. They are thus used regularly for both interior and exterior application. Sealants and adhesives are used in almost all parts of railway manufacturing. From design to production to maintenance, be it for high-speed trains to light rail transit.

Typical areas in Indian Railways are:

New Engines or Locomotives – Eg: DLW, CLW
Strip Down Maintenance of Locos – Eg: DMW Patiala
In running maintenance of Locos- Loco Worshop – Tkd ( Tughlakabad Shed, Howrah Loco Shed, Hubli Loco shed etc.
Railway coach manufacturing – RCF Kathurthala, ICF Chennai, Raebarely Coach factory.
Strip down maintenance of coaches- Jagidri workshop, Lucknow coach factory.
‘Sick Line’ Running Maintenance of Rakes
Signalling and track Maintenance.
station Maintenance .
RDSO Lucknow -approvals for any design change or technology change.

Key critical areas for Indian Railways

Indian Railways is Nation’s largest tranporter of people and goods. It is also the largest employer. Railways is poised to grow using better technology and managment structures. So what are the chief challenges Indian Railways is working to overcome.

Safety

Human lives can be compensated with anything and 8.5 billion ( approx) human lives have been tranported in 2019. Any development, change needs to be vetted from safety officials too.

Reduced travel time, more speed

‘ Speed is the need’ . Bullet train, Gatiman express, high speed rail tracks, fencing to ward of human and animals,

Lighter, Stronger, Safer, faster Locomotives & coaches
Protection against Corrosion
Track maintenance remote monitoring of tracks for regular maintenance and sabotage
Reduced operating cost
New track laying

Especially in the Himalayan range which includes Kashmir, Ladakh, Himachal, Uttarakhand, North East.

Health and Hygiene
On time running of trains, travel comfort and amenities
Dominant market share in inland freight

Advantages of Adhesive technology vs traditional methods

Being lighter in weight and offering greater adhesive strength is simply one of the advantages. We have listed some of the benefits of sealants and why they should be preferred:

Strength: Sealants show a much higher adhesive strength than welded bonds or fasteners. Alongwith that being flexible and immune to hazards.
Eco-friendliness:

Sealants and adhesives of today strive to be eco-friendly. They are formulated in such a way that they contain no isocyanate, silicone, halogens or solvents.
Application: Alternatives like welding require professionals who are skilled in the process of welding materials together. You cannot complete welding process by yourself. On the contrary, sealant or adhesive comes in spray cans. This makes application easier. Convenient even for home users. Furthermore, these sealants can be applied using a brush, spray, spreading, web coating, beads, wheel or dots.
Durability:sealants and adhesives do not corrode easily under harsh climatic conditions. Thus, it makes them more suitable than other alternatives like traditional fasteners and welded bonds.

Design • Build • Operate • Repair • Remanufacture

Options for new designs and innovate materials
New Products with upgraded Health and Safety
Impact and vibration resistant – the bond will endure
Solutions to improve durability
Solutions for light-weighting vehicle
Solutions to improve vehicle appearance

Rolling stock and railcoach adhesive applications

Windshield adhesive
Cockpit and panel bonding adhesive
Floor bonding installation
Headlight bonding
Door systems
Thermal and acoustic insulation

Kindly post your questions/ queries in the comment section or contact me at:
Bibhas Agarwal
anaghaengineers.in@gmail.com
Whatsapp: 91 9833892782
Call : 91 9699892782
www.anaghaengineers.in

2020-09-18

Windshield or Auto Glass Bonding Adhesive

Windshield bonding adhesive

This particular application may never have crossed your mind, but using adhesives on windshields is one of the oldest known uses of adhesives in the automotive industry. What started out as a substance that keeps the windshields in place, now does so much more. Windshield adhesive is among the oldest bonding applications known to the automotive industry.

Adhesives hold the windshield properly in place and offer support and stability to the vehicle.
In the unfortunate event of a crash the windshield remains firm improving the safety of the passengers.
The windshield doesn’t detach from the frame of the vehicle under most circumstances.
Windshield adhesives must endure changing weather and retain their flexibility at all times.

Types of adhesives for windshields

Windshields were bonded by using polyurethane or silicone in the earlier times before new-age windshield sealants were put in use. However, those glueing and sealing techniques soon became out of fashion. With the new technological advancements, smarter adhesives made of silyl modified polymers and modified silane polymers came up. They offer much more than just sealing. They can be used for more than only cars where the requirement is only for bonding and sealing. These adhesives also find themselves used in larger vehicles like buses and agricultural machinery.

Silyl modified polymer windshield bonding adhesive

These grade of sealants come in either one or two-component systems. Silyl modified polymer adhesives do not contain harmful components like isocyanates, halogens or silicones. This technological innovation brings its VOC down to almost zero.
Along with their fast curing properties, the need for a primer to start bonding. Combining all these factors together, we see that using a silyl modified polymer adhesive brings down the overall cost of surface preparation. It also saves on the time required.

Modified silane polymer windscreen bonding adhesive

Modified silane polymer adhesives are yet another considerably good option. They bond significantly well with wood, plastic, metal and other composite materials. They are also known as MS Polymers. Majorly recommended when the adhesive is put through a wide variety of climates. It fulfills the requirement to remain flexible.

They are formulated to benefit from the properties of materials such as acrylates, silicone, urethanes and butyl rubber. This makes them suitable for use in windsceen adhesives.They are also easy to apply and have fast curing systems just like silyl modified polymer adhesives.

Polyurethane Windshield adhesive

Polyurethane Windshield Adhesive is a component, moisture curing polyurethane based adhesive for
direct glazing in Automotive Glass Replacement.

PROPERTIES

One component formulation
Good non-sag properties
Short cut-off string
Cold application
Fast curing – Rapid strength development
High mechanical performance
High Modulus
High initial bond strength
Can be overpainted

TYPICAL TECHNICAL PROPERTIES BEFORE CURING

Basis : Polyurethane

Consistency : Thixotropic

Curing Mechanism : Moisture Curing

Density : 1,13±0,03 g/ml

Tack free time : 30±10 min. (23°C and 50% R.H)

Curing Rate : Min. 3,5 mm/day (23°C and 50% R.H)

Sagging : 0 mm (EN ISO 7390)

AFTER CURING Hardness Shore A : 55-60 After 28 days

Paintibility : Yes * Elongation at break : Min. 300% (ASTM D412)

Tensile Strength : Min. 4 N/mm2 (ASTM D412)

Windshield replacement

One of the most common and dangerous mistakes that people make while replacing a windshield is using the wrong type of adhesive. There are several materials like bathtub caulking or silicone which should be avoided completely. Currently, the products that are used to produce adhesives for windshields are Polyurethane, Silicon, Modified silicon, Butyrl and Acrylic. It is important to utilize strong adhesives and sealants to hold windshield glass in place.

It is important to understand the difference between adhesives and sealants. Adhesives are used to bind two different bodies together and sealants fill gaps and prevent the entry of water. There are a few differences between Urethane (adhesive) and Silicone (sealant) which include:

Urethane is 90 times stronger than silicone.
Unlike urethane, has better prolongation and it gets softened by high temperature & humidity.

The few advantages of urethane are:-

In case of an accident or a collision, urethane prevents the windshield from coming off its frame. It also prevents the roof from caving in, when the car rolls over. For long-term durability, car makers use urethane adhesive to bond the windshield to the frame of the car. Adhesives are exposed to cold, heat, humidity, rain and salt air for years to verify long-term strength.

During windshield replacement, the right balance between the viscosity and thixotropy of the adhesives should be ensured. It should be made sure that these urethane adhesives should not leave little trails over the windshield. Professionals should be contacted for the use of accurate adhesives.

How do you use a urethane adhesive on a windshield?

How to Fix a Windshield Glass

Apply the adhesive to the OEM urethane film on the pinch weld or directly to the glass.
Position the glass by aligning the masking tape on the glass and car body.
Press the windshield glass in place to ensure that it comes in complete contact with the adhesive.
Your windshield is fixed.

How do you remove a bonded windscreen?

Feed it through the bond from inside the car on an angle using small, long nosed pliars until there is enough poking out to pull with pliars. Take your time, keep handles flat to the glass with one man inside & one out & you should be fine.

How long does it take for windshield urethane to cure?

For the urethane to be fully cured, it can take anywhere between 48 to 72 hours, but after 24 hours it will be stuck securely in place.

How do I know if my windshield is installed properly?

If you notice any of these six signs that your new windshield isn’t installed correctly, make sure you take action right away:

Water Leaks Around the Edges. …
You Hear a Whooshing Sound at High Speed. …
The Glass Looks Wavy. …
It’s Not Flush with the Car’s Frame. …
You Hear Rattling Noises. …
The Old Adhesive Is Still There.

Kindly post your questions/ queries in the comment section or contact me at:
Bibhas Agarwal
anaghaengineers.in@gmail.com
Whatsapp: 91 9833892782
Call : 91 9699892782
www.anaghaengineers.in

2020-09-17

MS polymer adhesive and sealants

1. Why MS polymers? Traditional assembly methods and problems

Assembling materials which are not similar has always been a challenge. As a result, engineering methods have developed over the years to design parts that fit right in with each other. Some of the most common techniques we have seen include welding, riveting, fastening et cetera. However, these are not a complete solution. Alternatively, there are other challenges which are observed after the assembly process. These including the formation of stressed joints, unaesthetic assembly as well as noisy joints. When investing for labour and time, we absolutely don’t desire to have the engineering aspect of the assembly go to waste.

challenges with Silicone or polyurethane sealants.

Silicones is a good sealant but not as good with bonding.
Pu sealants- contain solvents, not UV resistant, limited elongation
epoxies have very limited flexibility

2. About MS polymer adhesives and sealants

What is MS polymer adhesive & sealant.

MS Adhesive & Sealant is a highly elastic, high strength sealant and adhesive. It has excellent adhesion to non-porous surfaces, will bond to damp surfaces and is paintable with most paints. Hybrid sealants are claimed to combine the strength of polyurethanes with the weathering resistance of silicones. In addition to their high performance properties, these sealants are achieving popularity due to their solvent-free and isocyanate-free nature and due to their formulation versatility that allows the customization of viscosity and early strength development for various applications.

Unique properties of MS polymer adhesives

Environmental friendliness (solvent-free and isocyanate-free)
Storage stability: shelf life is excellent although sealant must be protected from
moisture
Weather resistance and durability: MS sealant shows no cracking, splitting,
discoloration or adhesion failure after seven years of testing in desert climate
Stain resistance: MS sealants do not stain as some silicone sealants do because of
low molecular weight silicon materials that bleed from the surface of sealed
joints
Paintability: MS sealants provide good paintability unlike silicone sealants
Adhesion: MS sealants provide adhesion to various substrates including metals,
plastics, wood, and ceramics.

Advantages

MS sealant properties are chemically formulated to match the general requirements of a high-strength adhesive. they briefly are:

High initial tack properties reduce the need for initial support.
Fast curing, a quick build-up of end strength alongwith high sheer strength after full cure (no primer).
Easy to apply and easy to tool and finish.
Remains elastic after curing.
No odor.
Does not contain neither isocyanates, silicones nor solvents.
Paintable with all water-based paints.
Excellent color stability. Likewise, weather and UV resistance.
Good adhesion on wet substrates, bonds underwater.

Uses of MS adhesive and Sealant

Building & construction

Sealants for natural stone joints and perimeter joints
Sealing and bonding of a variety of substrates such as stones, plastics, metals, etc.
Panel adhesives
Tile adhesives
Sealants/adhesives for vibration damping applications
Mirror bonding
installation photo frames, furniture panels etc on walls, tiles- good for internal and external work.

Industry

Sealants/adhesives in the automotive and transportation industry
Marine / deck caulking
Sealants/adhesives for solar energy modules
windscreen, glass bonding for automobiles, railway coaches

Flooring

Parquet adhesives
Adhesives for vinyl flooring

DIY/consumer

Multi-purpose sealants/adhesives
Mirror adhesives
Sanitary sealants
High /fast tack adhesives

How MS polymer changes the game!

Anagha Engineers has formulated a MS Sealant for such applications.Not only that it is simple to use but also that it does not require trained labour. Just apply a uniform bead of the adhesive onto the areas which need to bond. Assemble it against the surface that you need to bond it. Apply pressure for a minute. Finally, watch as the high tack properties hold together the parts immediately.

Where can you use MS polymer Technology?

Elastic bonding of panels, profiles and other pieces on the most common surfaces. (wood, MDF, chipboard, etc.).
Bonds without primer to mostly all materials used in the construction and automotive industry. Some of the materials on which Supex Bond ALL HT works well includes aluminium, galvanized and stainless steel, copper, zinc, natural stone, concrete, brick, HPL panels, treated wood, glass, gypsum, various synthetic materials, glass, mirror, etc.
Gluing of panels and elements in the interior and ceiling construction. Above all, it works well with wall cladding elements and ceiling panels (interior), isolation panels.(mineral wool, wood-wool cement & plastic foams, PUR, PIR, PS)
Wooden & plastic lathes, ornaments, frames, doorsteps, window sills, skirting boards as well as roofing elements.
Supex Bond All HT’s bonding properties become extremely useful in extreme high-end applications. Those including marine, shipbuilding, deck, plastic bonding.
Lastly, gluing and fitting of safety glass especially used in the banking industry and fitting of cable ducts. It can as well be used for mitres in aluminium windows, mirrors etc.

MS adhesive applications in transportation indutry

MS polymer adhesives and sealants are suitable for train, truck and bus assembly. The most common applications include:

Bodywork assembly: MS polymer adhesives offer a strong and easy to apply system for bonding bus frames, truck cabins and body structures of trains.
Sealing and bonding windows: sealing and bonding vehicle windows and windshields. The flexibility of MS polymer adhesives and sealants guarantee high performance on windows and windshields of vehicles.
Sealing floors, roofs and interior and exterior panels: MS sealants are also used for sealing floors, roofs and side panels of vehicles. Their flexibility allows for high performance, whereas the minimum surface preparation and ability to bond dissimilar materials guarantee assembly efficiency.

Hybrid MS Sealants

Hybrid sealants are of increasing interest because they can be formulated to provide the best properties of two or more families of polymeric materials while limiting their individual inherent weaknesses. Eg, a polyether or a polyurethane polymer can be terminated with silyl groups (related to silicone polymers) to yield a high performance sealant having many of the beneficial characteristics of both polyurethanes and silicones without many of the disadvantages.
There are two main types of hybrid sealants: silyl-modified polyethers (known as MS polymers) and silyl-modified polyurethanes (known as SPUR polymers). They have closely associated chemistry and many common features. Because of the similarity of their polymer backbones, collectively these polymers are sometimes referred to as silylterminated oligomers. The main application for these materials is as sealants in the building and construction industry.
Hybrid sealants are claimed to combine the strength of polyurethanes with the weathering resistance of silicones. These sealants are achieving popularity due to their solvent-free and isocyanate-free nature and due to their formulation versatility that allows the customization of viscosity and early strength development for various applications.

MS adhesive vs 2 part epoxies

Advantages with MS polymer adhesive

no mixing required
suitable for flexible bonding, can withstand flexing and vibrations. Epoxies are brittle after curing.
no wastage since it is one part, with 2 part adhesive extra mixed adhesive is wasted.
tack time is quicker than 2 part epoxy, bonding is faster
excellent environment resistance vs epoxies
no voc, no pungent smell like epoxies
direct adhesive cost is also much lesser than 2 part adhesive systems.

Looking for the perfect MS adhesive or sealant for your project?

In case you are curious about what MS adhesive & sealant can do to your project or product, or would like to enquire about a MS adhesive or sealant, do not hesitate to contact us. Our experts make sure your application gets the Hybrid polymer system it deserves.

2020-09-16

Sustainable Adhesives Sealants | India | Supex

Sustainability - The Need Of The Hour

Our world is seeing a population ride, the likes of which we have never seen before. Like the famous David Attenborough claims, “If we don’t keep control on our population, nature will have to do it for us.” And now, more and more people are coming to terms with this. Over the past years, we can observe an increased overall global effort to push for sustainable ways of living. It is time that we begin to come to terms with the fact that the small things which make our lives simpler are, in fact, killing the environment.

Traditional industries are all making efforts to operate at a more sustainable level. From using plastics to replace sand in concrete to vast innovations in the renewable energy sector, such news truly delights us. Though we are far away from repairing the damage we have done, the rising of this idea has, and will continue to lead us to save our earth.

Is the use of sealants and adhesives truly good for the planet? In this article, we show you how this industry has been at the forefront of sustainable actions.

We have listed below some of the reasons we claim sealants and adhesives to be sustainable products that don’t hurt the environment:

Firstly, these adhesives and sealants undergo formulation to contain less or no harmful organic compounds that can affect the surrounding environment. It poses no danger during application. Alongwith that, the finished product after curing does not let out environmentally-harmful substances even after a couple of years down the line.
secondly, As most sealants and adhesives are one-component systems, they do not require solvents for priming purposes. These so-mentioned solvents tend to have damaging effects on the environment. The absence of these, therefore, further reduces any form of emissions that can occur.
Lastly, the rules and regulations towards more sustainable products: Sealant and adhesive manufacturers maintain the strictest of environmental guidelines. These guidelines fall directly in line with the standards placed by governments. For governments, this is a critical area since the lack of strictness could lead to damaging the lives of their country’s people. Nowadays, the strict guidelines from the West regarding the VOC emission limits of chemical products are slowly becoming the norm for the growing markets of the East.

Sustainability of adhesives sealants in India

When you take a look at the advantages of these sealants, you can understand that this does not come easy. Subsequently, two methods can be linked to the sustainability of new-age adhesives and sealant-

-by revamping the existing technologies to suit the standards.

-By formulating new and innovative products.

We can broadly categorize sustainable adhesives into three groups:

Solventless adhesives:

Solvents used in the old days did contribute to environmental damage. However, the arrival of solventless adhesives has transformed the market altogether. These adhesives and sealants are intelligently designed by increasing the share of solids in the product. Consequently, in today’s market, even 100% solid adhesives are available.
Waterborne adhesives:

Water is a splendid alternative to using solvents. Adhesives of this nature require water to act as the carrier material. Water, in fact, also helps in bringing down the overall weight of the adhesive and the possible VOC emissions. Besides, using waterborne adhesives also has the added advantage of reducing the risk of fire during the time of processing.
Biobased adhesives: A relatively new form of adhesives, these are formulated using materials such as starch, vegetable oil and proteins, among other materials. By using these biobased raw materials, the question of environmental sustainability does not arise.

The sealant industry is helping other traditional industries take the first step towards sustainability. With its varied products and rigorous innovations, sealants and adhesives see a bright future in the sustainable products market. By taking a look at the demand, we at Anagha Engineers have been working to include eco-friendly sealants and adhesives in our product portfolio. You can also check out our products below.

We are also working to build a broader product portfolio that can include the following types of sustainable sealants and adhesives:

Renewable adhesives:

These are adhesives similar to bio-based adhesives. Made from plants and beeswax, they are believed to be the next significant innovation in the sealant and adhesives industry. A major scoring point for this type is that they contain absolutely no petroleum derivatives. Some of their current applications include bottle labelling as well as carton sealing.
Recyclable adhesives: The idea of these adhesives is that they can be collected and applied again to use even after their service life is over. By melting these adhesives, you also eliminate any adhesive waste or residue.They are Generally used in the automotive industry for bonding glass, aluminium and steel, these adhesives see a rise in demand as well.
Biodegradable adhesives:

Commonly seen in paper packaging, these adhesives are incredibly eco-friendly. In a way, once these adhesives degrade, they give back to the environment. No waste is produced, and the adhesives are also bacteria-friendly. Alternatively, some other applications of these type of adhesives are in hygiene and medical products.

In a world slowly trying to move to a sustainable model, the sealant and adhesives industry is at the front with the rest of the innovators. Being responsible for our planet is a core ideal of this industry. At Anagha Engineers, we strive to follow the same.

Do go through our blog page. We write articles to educate the people about how the industry is shaping to making your lives better. Through our YouTube Channel, we bring you insights and tutorials on the various applications of sealants. In addition, we will be releasing a video soon, about the sustainable adhesives in our portfolio. You can view both pages by selecting from the buttons below. Or better yet, give us feedback! There’s nothing we’d love more.

Do reach out to us in case of any query. Our experts are always available to help you with your sealant needs.

2020-09-15

FDA approved Food Grade Silicone sealant | Supex India

What is a food grade approved adhesive & sealant?

Food grade holds two separate definitions:

It is a material that is safe for human consumption.
It is a material that is suitable to come into direct contact with food products.

The FDA (U.S. Food and Drug Administration), has its own set of complex regulatory processes that determine whether every additive in a specific food is safe for human consumption. The agency’s procedure includes a long list of steps to take to guarantee food grade status, starting with the identification of the substance, a breakdown of the properties and purity standards for each substance, and the limitations on conditions of use.

The Differences Between Food Grade and Food Safe

We must be able to distinguish ‘food grade’ from ‘food safe.’ Though it’s fairly common to hear these two terms used interchangeably, the concepts – and corresponding regulations – behind them are actually quite distinct.

‘Food grade’ demands that all food components, as well as the surfaces and tools that interact with them during the manufacturing/assembly process, are safe for human consumption and/or exposure. On the other hand, ‘food safe’ refers to the material which comes into contact with the food having no dangerous effect on the consumer.

What makes these two concepts different is that ‘food grade’ contains the detail that temperature or environment will not impact the integrity of the material, but that is not necessarily true for ‘food safe’ materials. For example, a plastic container may be ‘food safe,’ but it doesn’t meet the criteria for ‘food grade’ status because it can’t withstand certain high temperatures.

How to be Food Grade-Compliant

Food grade compliance is an all-encompassing process that requires all food components – and the surfaces with which the components make contact – to contain materials that are safe for human consumption.

Which Industries require food grade approved products?

Which Products Need FDA Approval?

Human and animal drugs.
Medical biologics.
Medical devices.
Food (including animal food)
Tobacco products.
Cosmetics.
Electronic products that emit radiation.

Typical Indutries include :

Pharmaceuticals
Food manufacturing
Hospital
Institutional Kitchen for hospitality
Clean Rooms
Cold Room storing Food items
Medical Device manufacturers
OEM suplying equipments to FDA complaint institutions

Food Grade RTV Silicone Sealant

Silirub IS , Industrial Seal

It is a food grade silicone sealant that uses a moisture cure system. It is a high- performance moisture cure silicone sealant with outstanding adhesive/sealing properties. Hence it is an essential tool in every critical industrial application. Despite being an industrial product, Silirub IS is also approved by the FDA and thus can also be used in food preparation and storage environments like restaurants.

Applications of Silirub IS

When looking for a sealant for industrial purposes, Silirub IS is the preferred sealant to buy from the store. It typically finds application for a wide range of situations and materials like:

Sealing of lock seams and joints in the ductwork
Joining of welds and Fasteners in metal fabrication
Application on corrosion sensitive substances like chrome and steel
Food-grade environments like food storage units and restaurants
Electrical applications
Solar panels
Top Sealing and glazing jobs
Joining together PVC and other plastics with glass

Silirub B&K – Bathroom & Kitchen Sealant

Silirub B&K is an anti-fungal silicone sealant that offers high performance when it comes to sealing/bonding activities. As a rule, in areas that remain wet most of the time. Commonly used in kitchen and bathroom areas. This product is also FDA approved (food grade) by Ianesco (France).

Applications of Silirub B&K

Since it is FDA approved, it finds more interior applications than in the exterior. Thus, some of the commonly found uses of this product include:

Bonding/ Sealing of joints in sanitary applications and kitchens.
Used for sealing joints in container and cold store applications.
Silirub B&K also used for glazing works and even air conditioning sealing.

Boss 322

BOSS® 322 100% RTV Silicone Sealant is an one part acetoxy cure adhesive sealant that is suitable for general construction sealing and adhesive applications. This product will adhere to clean metal, glass, many types of wood, silicone resins, vulcanized silicone rubber, ceramics and plastic surfaces. Cured sealant stays rubbery from -60°C to 120°C.

BOSS® 322 100% RTV silicone sealants ideally suited for sealing, glass, windows, shopfront, aluminium joints, showcases, clean rooms, hospitals, hotels, pharmaceutical factory maintenance, bus body building and automobiles.

Medical Grade Adhesives

Medical adhesives applications typically involve the bonding of plastics and metals. In addition to bonding parts together successfully, medical adhesives must also be compatible with direct or indirect contact with the body, depending on the application. It may also be required to withstand sterilization through a variety of potential methods.

Medical grade adhesive are designed to bond medical products, such as syringes, dialysis filters, blood bags and tube connections. These medical devices are usually made from a range of synthetic materials, including
plastics that are hard to bond, such as PEEK, PE and PP.

Disposable medical products are often produced in large quantities. In addition to their mechanical bond strength, fast curing of the adhesives used is important to allow high volume production. For transparent and UV-permeable materials, UV-curing medical grade adhesive can be used. For UV-impermeable substrates LED curing is recommended.

Typical Applications

Bonding of needles to hubs
Bonding of filters
Bonding of tube sets
Bonding of reservoirs
Bonding tips to swabs
Bonding foam and rubber pads in assistive devices and prosthetics
Bonding & sealing electronic components
Sealing oxygen connections
Threadlocking for vibration resistance
Wire tacking
Bonding handles onto walking frames

NSF Certified Sealants & Adhesives:

It is essentail to ensure the components used in the manufacture, installation, maintenance, and repair of foodservice products are also NSF Certified so as to maintain the product certification’s integrity.

Sealants & adhesives, particularly silicone, are integral components of the manufacture, installation, maintenance, and repair of dishwashers, commercial refrigerators and freezers, transporting equipment, food display units, heating elements, ductwork such as exhaust vents & range hoods, and many other foodservice products that NSF certifies.

NSF certified sealants & adhesives are food safe sealants, meaning they do not cause food borne illnesses when they come into contact with food and/or drinks.

NSF-Certification?

NSF certification is a voluntary product certification in foodservice that addresses sanitary requirements, certifying that food service equipment is designed and constructed in a way that promotes food safety. NSF Certified products undergo rigorous, strict, and regular testing & auditing. The certification process consists of:

A physical evaluation of the product to ensure it meets prescribed food safety standards.
Testing and evaluation is performed on the materials used to make the product to make sure they meet prescribed standards.
The facility and product must also undergo annual follow up audits to maintain certification.

2020-09-14

RTV Silicone Sealant FAQs | Supex India

What is RTV silicone sealant

RTV , Room Temperature Vulcanizing , Silicone sealant is a sealant in viscous liquid or paste form which cures into a flexible rubbery solid material when exposed to atmosphere. It reacts with the moisture from environment , cures and releases a bye product . Silicones are classified based on the type of be product released.

Silicone Sealant applications

Uses of RTV Silicone sealants. Silicone sealant is a very versatile product and widely used for a variety of applications.

NSF Certified Silicone Sealants, are the ideal rtv sealant to use in the manufacture, installation, maintenance, and repair of foodservice equipment, or applications where food contact may occur.

pharma companies, clean rooms
Foodservice appliance manufacture and repair
Residential, Commercial, and Industrial refrigeration units
Other applications where contact food may occur such as food display cases, transportation devices, etc

High Temperature RTV Silicone sealant are specially formulated for high temperature performance.

Sealing and encapsulating heating elements
Industrial seals
High-temperature ductwork
Sealing stove and furnace vent pipes
Oven and wood stove window seals
Industrial ovens
automotive silicone sealant, automotive silicone adhesive, auto silicone adhesive, silicone sealant for cars, automotive rtv

Antifungal/mild dew silicone sealants are specially formulated to inhibit the growth and spread of mildew – a type of mold characterized by a dark colour & offensive musty odour. Mildew can pose a host of health concerns, and so inhibiting its growth is important.

- Tub, tile, sinks, and counters
- Shower stalls
- Floor drains

General silicone sealant uses:

HVAC/R applications such as penetrations through the exterior of a construct
Electrical applications such as service entrances
Roofing applications
Plumbing applications
RV, trailer, and speciality vehicle manufacture and repair

Flange sealing/ Gasketing: replacing solid gasket in Engine, transmission, heavy-duty gear box, turbines, pumps, casings & etc

Advantages of Silicone sealant and adhesives

Advantages: First, because of its molecular structure and high bond energy, silicone has excellent ageing characteristics and is resistant to ultraviolet light and weathering. This gives silicone a longer effective lifespan than organic materials,such as EPDM, polyurethane, polysulfide and butyl, which are prone to degradation from UV light.

Types of Silicone Sealants

Silicones are classified with keeping in mind their curing systems

Acetc acid cure,Acetoxy
Neutral cure
Alkaline cure

Acetoxy Silicone sealant

Most popular & thus used extensively due to lower costs. One of the top selling product amongst silicones. Features including Acetoxy cure , low cost , low elongation, Resistant to sunlight making it undoubtedly suitable for general gap filling applications.

GP Silicone sealant – Why is it so popular in India

GP, General Purpose Silicone sealant is a very popular silicone used in India for sundry applications. Though it may not be the right/best sealant yet its popularity leads to the question why.

low price – DIY Silicone is sold from local Hardware shops. The ‘low cost types’ are sold in 240, 260 gms cartridge, actual sealant is approx 170-180 ml per cartridge. The end customer is happy to get one tube( size of cartridge looks the same as 280 ml ) at low price and the manufacturer/importer is happy since the price/ ml is still not less. Also sometimes the ‘B’ , ‘C’ grade silicones are imported at very less cost too.
availability: it is widely and easily available unlike other sealants which is sold through institutional channels and a DIY customer doesnt have access to it.
Awareness: local plumbers/waterproofing agencies/ electrician/ end customer are satisfied having used a sealant instead of putty or traditional sealing material. As the market matures the consumer would ask for suitability and quantity of sealant. Manufacturers would educate and differentiate their products from the commodity.

Disadvantages of using GP Silicone sealant

bonding with porous substrates is poor ,eg: concrete
bonding with uPVC is poor
strong odour
releases acetic acid as by-product during curing, this acid is corrosive and corrodes metal surface. Automotive OEM generally dont use acetoxy silicones in the engine/transmission/ under the hood.
it is not sensor safe
durability and sustainability is lesser than neutral grade silicones
shrinkage due to high solvent content

Neutral Cure Silicone Sealant

Higher grade Silicone sealants particularly used for technical as well as critical applications.

Classification of Neutral cure silicones

Construction – Structural, Weather, Sanitary/kitchen, Neutral+ general purpose
Industrial- Gasketing/Flange sealing, Food grade approved, High temperature
Electronics – Potting, Encapsulation, Electrically and Thermally conductive types

How to apply silicone

Sealants

Clean and prepare the surface by removing old sealant dirt, and other debris to ensure a strong adhesion between the sealant and the surface.
Apply masking tape at the edges ( beyond the joint to be sealed) – this will ensure sealant remains inside the joint , also edges dont get smeared with sealant – better aesthetics
Cut the tip off the cartridge and screw on the removable nozzle and cut tip to your desired bead size. Insert cartridge into standard caulking gun.
Hold at a 45° angle and apply silicone sealant ahead of nozzle to achieve a smooth seal
Complete tooling within 5 minutes using your finger or a damp paper towel. Use a dry paper towel to remove excess material.
Sealant normally “skins over” in 5 minutes, dries to touch in 1 hour, and cures & bonds in 24 hours. Allow 7 day cure time to reach maximum strength.If you require more than one tube for your project – you can screw the nozzle from the previous tube onto the new cartridge in order to keep your bead size consistent.
If you have sealant remaining in the tube, seal the tip with masking tape or grease to prevent air exposure
Wipe hands with a dry cloth, and then wash with soap and water.
for repetitve work you can use battery operated sealant gun for site work , pneumatic gun for production work. Sealant consumption/wastage is reduced, worker efficiency improves due quick application with minimum physical effort.

FAQs RTV Silicone Sealant

Is rtv silicone paintable?
Silicone sealants are not paintable. For a paintable solution, we recommend our acrylic sealant, Supex 500, or ms sealant, Supex Bond All.

What colours do rtv silicone adhesives come in?
They are available in Clear, White, Black, and grey. Popularly they are called clear rtv silicone, white silicone sealant. Special grades are available in brown ( RAL 8017, 8007), Grey ( RAL 7047), ivory, Brilliant white etc. for bulk quantities we can make in the colour of your choice.

Do I need to use different rtv silicone for different jobs?
Yes. silicone sealant differ in their formulations and their intended use. Properties like adhesion, flexibility, elasticity, and durability vary substantially from product to product so it is important to select the right product for each job.

If you need to know the best sealant to use for your application, contact us. We will be happy to help you select the best product for your application.

Do I need to prepare the surface material before applying rtv silicone adhesive sealant?
It is recommended that you adequately prepare the surface(s) to be sealaed so as to ensure a tight, strong seal. You should prepare the surfaces within 24 hours of application of the product.

For metals, glass, plastics, and other similar materials prepare the surface by applying a solvent such as mineral spirits. Make sure to wipe the surface dry with a clean cloth. When using solvents, make sure the area is well-ventilated. Make sure to follow any and all safety precautions.
For porous surfaces, use a sandpaper or wire brush where needed in order to ensure a clean surface.

Do not use silicone on galvanized surfaces. Do not use in areas that will be continually submerged in water. Do not clean with a detergent or soap & water as silicone will not adhere well to surfaces where soap residue and/or soap scum is present.

Can I apply new rtv silicone over, or alongside old silicone sealant?
It is recommended that any old silicone sealant is removed. While new, freshly applied rtv silicone can be applied & will bond to old silicone – the bond isn’t as strong as if it were applied to a clean surface.

What do the terms “Tooling” and “Tooling Time” mean?

Tooling refers to ‘working’ the caulk, often times to smooth or otherwise manipulate the caulk.
Tooling Time refers to the amount of time you have to “Tool” (or work) the silicone before it begins to skin over

What is the tooling time for silicone sealant?
Normally rtv’ adhesives begins to skin over in 5 minutes, so all tooling should be completed within that time frame.

What does the term “Skinning Over” mean?
Skinning over means that the product has begun to cure and has developed a firm skin formation on the surface.

How do I store silicone sealant?

Remove the screw on nozzle, and make sure any air is removed by pushing the sealant to the tip of the cartridge before replacing the screw on nozzle.
Replace the removable tip.
Store in a cool, dry environment.

Does silicone sealant go bad?
Anagha Engineers stands behind a one year shelf life guarantee of our silicone sealant adhesive products, from date of manufacture. This is tracked by batch numbers, which indicate the date of production.

You can always test the sealant before starting a project by running a small bead of it on a scrap piece of wood, cardboard, etc. If after approximately 15-20 minutes the product has not formed a “skin”, the product is most likely expired and will not fully cure.

If the silicone adhesive has hardened (cured) in the tube, it can not be used and has most likely passed its shelf-life. If you have reason to believe the product has not passed its shelf life, return it to the place of purchase or contact Anagha Engineers directly.

Once I have applied the silicone, how long do I need to wait for it to cure?
Typically silicone sealants will cure in 24 hours. This cure time could vary depending on environmental factors – primarily the moisture in the air. Since this is a moisture curing silicone sealant, it relies on the moisture in the air to cure.

How much will a single tube of silicone sealant cover?
Available in 260,280,300 and 600 ml packing. The yield from these cartridges varies from application to application, based on the joint depth & width and bead size. You can utilize our sealant calculator to determine the approximate number of linear feet you can seal based on the amount you have on hand or use it to estimate the number of tubes you will need to

RTV Silicone Sealant FAQs |RTV Silicone sealant at best price| Mumbai IN

2020-09-12

HVAC Adhesives & Sealants | Supex India

Basics of HVAC System

What is HVAC and how does it work?

Heating, Ventilation, and Air Conditioning. This is used to provide heating and cooling services to buildings. HVAC has become the required industry standard for construction of new buildings.

How many types of HVAC are there?

There are four main types of HVAC systems. There are split systems, hybrid systems, duct-free systems, and packaged heating and air systems. Each of these units have pro’s and con’s, and knowing these factors can help you decide which is best for you.

What are the main components of a HVAC system?

Heat Exchanger. …
Blower Motor. …
Combustion Chamber. …
Condenser Coil or Compressor. …
Evaporator Coil. …
Thermostat

What is the purpose of HVAC system?

A Heating, Ventilation and Air Conditioning package, also known as HVAC system, removes contaminants in the air and conditions indoor air either cooling it or heating it to provide comfort. Air contains many pollutants. If you let it in to your home without purifying it, you or your family might end up getting sick.

Why HVAC Adhesives Sealants are required?

HVAC unit consists of engineering parts like Heat exchanger, Blower motor, Compressor, Coils, thermostat and etc. Engineering adhesives and sealants find applications for such mechanical parts for locking, sealing and bonding. Also that such heavy equipment generate vibrations and noise which needs to be addressed. So the need for vibration & sound dampening adhesives and sealants.
Furthar these engineering components are assembled, fabricated into packaged units and connected to complicated ducting systems. These ducts finally terminate as grills etc hanging from pipes or fixed onto walls/ false ceilings.
Efficiency of HVAC system largely depends upon how this air is sealed or that there are no air leakage losses. Air leakage loss implies more work for the engineering components – more energy consumption , more wear & tear.

Applications and Products – HVAC adhesives sealants

Commercial and residential HVAC system require proven sealing, bonding and noise deadening systems. Manufacturers HVAC adhesives sealant technologies to bond, seal and soundproof metal bodies and frames in filter systems with EHS friendly and certified solutions, achieving thus cost-optimization and long-term results.

Structural Adhesives

Bond and seal metal bodies and to secure stiffeners on thin metal sheets, while providing a structural, weatherproof and vibration damping joint that can be over-painted.

ADVANTAGES
Safe and long-term durable joints, Simplified assembly instead of mechanical fixtures
Material savings due to the potential use of thinner metal sheets
No corrosion caused by screw holes and rivets
Damping of vibrations and noise

MS Polymer Adhesives

MS Polymer adhesive & sealant is Low odor, ageing and weathering resistant, bonds well to a wide variety of substrates without the need for special pretreatments. It is suitable for interior and exterior elastic sealing and bonding applications on substrates such as timber, glass, metals, metal primers, ceramic materials and plastics.

TYPICAL APPLICATION AREAS:

General machinery, body and frame sealing and bonding
Hygiene, ventilation and air conditioning systems
Store refrigerators and refrigerating rooms and trucks
Food processing and packaging machinery
Sealing and bonding in recreational vehicles

HVAC Duct Sealant

HVAC Duct Sealant is a single component acrylic ;

high-performance sealant and ideal to use in HVAC applications. Supex Duct Acrylic Sealant provides excellent strength, bonding and forms a strong seal against air leakage. The product is acrylic emulsion-based hence, eco-friendlier and paintable after full cure.

Application areas : Sealing pipe joints, Ductwork, Ductwork seams

Polyurethane Sealants

Supex PU 25 is a single component polyurethane

based elastomeric sealant / adhesive that was
design for industrial application. It can be painted. It forms a highly elastic, tear and weather resistant joint. It adheres without primer on substrates commonly used like wood, anodized aluminum, polyester, glass, concrete, baked clay, stone, ceramic tiles. Applications :

HVAC cabinet
Truck and trailer sealing
Adhesive for roof bows of truck and trailer
Refrigerated counter

Polyurethane Foam Spray Gap Fill Sealants

Supex 100 PU foam spray sealants are used to fill large gaps. The HVAC systems that make a home comfortable create penetrations (openings) that can create drafts, making living spaces uncomfortable. These penetrations not only allow air to seep into and out of the home, but they also may be forcing equipments to work harder than they need to.

Where to buy HVAC adhesives and sealants?

Anagha Engineers’ products are available across India through our distributor network. You can call / Whatsapp / SMS +91 9833892782 for quick response, best price and technical support.

Sealing Ducts: What’s Better, Tape or sealant?

Most duct systems have numerous leaks that waste energy and lead to room-to-room pressure imbalances.

All about sealants

Most energy-conscious architects seal duct joints with acrylic sealants. It is a water based sealant . Duct joints should always be secured with sheet-metal screws before seams are sealed with mastic.

All about duct tape

Since common hardware-store duct tape — technically known as cloth-backed rubber-adhesive duct tape — fails quickly when used on ducts, most energy-conscious contractors seal duct joints with a sealant. Although Sealants works well on galvanized steel ductwork, it has its disadvantages: it is a little messy to apply.

Difference between acrylic sealant and silicone sealant

It’s important to know the differences between silicone and acrylic sealants, as well as their advantages. With all the information in front of you, you’ll be able to compare these two sealant types to one another before deciding on the one to use for your project.

One advantage acrylic sealant has over silicone sealant is paintability. Most paints can be used on acrylic sealants, which is not the case with silicone sealants. However, if the sealant is for your ductwork, there’s no real need for paint. Disadvantage of silicone is that it produces an unpleasant vinegar odour during curing, but there are also some odorless silicone options, however at higher cost.

Advantage of silicone sealants are more flexible and longer lasting than acrylic, and they do not have a volume shrinkage. Acrylic sealants have a major disadvantage in that they are water permeable. It’s advised that you not use acrylic in damp or humid places due to the risk of fungus / mould growth.