Glass Sealants: The Versatile Bond

Glass Sealants

Wacker Silicone Sealants
Hiding in every nook and corner of our daily lives are the wonder chemicals categorized broadly as Sealants. Varsha Trehan takes a look behind the glass facades to understand the role of glass sealant products in modern construction.


Window glass insulation is more efficient, paints and coatings hold better and brighter for longer periods, flooring finishes retain their sheen and the exteriors are water-, mold- resistant too. And this is just around the house. Sealant technology has extended the life of heritage structures, increased scope for architectural design by adding flexibility and durability to materials and joints. There is added safety by coating glass facades to make them impact resistant. Insulation properties are enhanced too without added maintenance effort.



Kishor Srinivasan
As modern construction norms focus on durability and safety, use of sealants and adhesives add to reliability of buildings. "Earthquakes and similar events are a serious threat to buildings. Even in regions with a comparably low exposure to natural disasters, structural movement is a general problem. One factor, for instance, is ground compression. This often leads to movement after construction, which may afflict buildings considerably. Temperature is also a problem, especially in regions where seasonal or intraday temperatures vary considerably. So there are a lot of forces which exert stress on a building, and this is especially true for its gaps and joints. Silicone sealants are a reliable way to seal joints against the elements. At the same time, they cushion movements between parts resulting from temperature changes, humidity, shrinkage of construction material, sound, wind and other mechanical shocks," explains Mr Kishor Srinivasan, Manager Sealants & Adhesives, WACKER Metroark Chemicals. In India, WACKER offers three Sealant lines (classic, hybrid, professional), thus providing a wide range of high-performance silicone sealants.

Amit Malhotra
Waterpoof Sealant Crack Filling
Commenting on the increasing presence of Sealants in our daily environment, says Mr Amit Malhotra, Managing Director, McCoy Soudal Adhesives and Foams "Sealants are now used in every part of our daily lives cars, buses and coaches, railway, doors and windows, bathrooms and kitchens, building facades, industries, etc. Every household will be using sealants for DIY (do-it-yourself) repair and maintenance applications very soon. Sealants are and will be indispensable products for a wide range of applications, for two main reasons: problem solving and aesthetical & perfect finishing." McCoy Soudal is one of the largest manufacturers of Sealants, Adhesives and Polyurethane (PU) Foams in the world, with seven manufacturing plants and operations spread in more than 30 countries and products availability in more than 120 countries.

Vidyut N Acharya


"Sealants and Adhesives have played a vital role in the construction industry for the last 30-40 years. The performance of all these sealants can be even seen today with the kind of durability the old structures possess," corroborates Mr Vidyut N. Acharya, Director, Associated Chemicals. Associated Chemicals are known by their Acecoats brand of Construction Chemicals.




Holding it together

Padmadas Nair
In a time when construction projects are becoming taller and faster, installation of glass facades is a popular choice to meet the need for modern architectural design and engineering. While glass products have emerged to meet the challenges of extreme climatic conditions like those in India, sealants are working to hold these facades in a manner that boosts the customer confidence. Speaking of the silicone-based sealants Mr Padmadas Nair, Commercial Manager, Dow Corning India Pvt Ltd explains "Silicones are inherently UV-stable and hydrophobic in nature. Because of this, silicone-based sealants have extremely good weather resistance. This characteristic, coupled with the fact that silicones are durable and remain elastic under extreme weather conditions helps in better insulation and water proofing of buildings and other constructions. Dow Corning's silicone-based materials, created through research and innovation as well as close collaboration with customers, have a history of use of more than 30 years now – this by itself is a testimonial to the durability of silicones."

One Indiabulls Center
"The change in environmental conditions, effect structures to a very large extent. Factors such as waterproofing, adhesion, temperature variation, thermal stability, elongation, UV resistance, hardness shore, shrinkage and tensile strength have a very vital role when it comes to movement related to structures, which can be associated not only due to temperature variation, but with natural disasters as well. Now-a-days, sealants and adhesives are designed in such a manner that it complies with all of the above standards, which are important in the well-being of a structure" affirms Mr Vidyut Acharya.

"Silicone sealants play a major role, simply because of their outstanding properties, their easy handling, and their durability. They can be used for sealing windows, gaps, and all kinds of constructive joints, so they are an integral part of any façade. Silicone sealants meet the high specifications of this application through their excellent property profile – excellent weatherability, UV-, and aging resistance, very good movement capability and long-term functionality. They also exhibit outstanding adhesive strength to both non-porous and porous substrates," adds Mr Srinivasan.

Promoting fenestration

Glass facades are increasingly spotted across the country's landscape. Fenestration is a design and structural element adding value to building elevations. It needs much attention at the construction stage to ensure that insulation from sound, thermal variation, dust and moisture is at high efficiency levels. This is achieved significantly with the inclusion of appropriate sealant products. Recognizing this need, Construction Chemical companies have developed product ranges of adhesives and sealants specific to glass construction applications. "Fenestration includes windows and curtain walls as well as accessories, but also installation, glazing, sun screens, etc.
fenestration
It is one of the important key players as part of the building shell and essential for achieving the ambitious targets. Innovative fenestration products have a better thermal performance and gain more energy to substitute energy for heating and lighting. The right combination of glazing and products are required to prevent high energy use for cooling and to ensure summer comfort. The whole energy approach for new buildings is very important and the same principles should apply when replacing windows to improve energy consumption of the building. Therefore, McCoy Soudal has launched a special package for the fenestration segment to offer insulation benefits by making them economical, durable and easy to maintain," offers Mr Amit Malhotra.

"The window sector involves several ways of sealing: connection joints between the window frame and the masonry; sealing between glass and frame; sealing and bonding of aluminum windowsills, and profiled glazing. The silicone sealant in the window area has to endure extreme load at all times. This includes substantial temperature changes, variable weather conditions such as sunshine, rain, snow and frost, wind pressure and considerable movements between structural elements made of different materials. The sealant therefore combines the functions of a weatherseal, a seal and a bond. An ideal combination of useful properties makes silicone sealants suitable for all key applications," avers Mr Srinivasan.

Energy optimization

Builders and their clients are taking on their share of energy conservation to save on the costs to their wallet and that of the environment. "Buildings contribute approximately 40% to overall energy consumption; however a properly designed and engineered façade can enable considerable decrease in energy consumption. A well-engineered façade, together with the right usage of silicone sealants and the appropriate selection of glass provides thermal insulation and water proofing which helps reduce energy consumption in buildings. In addition to providing the structural strength to adhere the glass to the substrate, the silicone sealant also provides the flexibility to architects to help design buildings which are aesthetically pleasant and also compliant with safety and sustainability norms" asserts Mr Padmadas Nair.

Hybrid Sealants
Projecting the safety and comfort offered to interiors, Mr Srinivasan details," Silicone sealants used for sealing windows and glass facades in office and apartment buildings help to keep humidity and heat outside. This not only improves the effectiveness of the air conditioning system, but also allows for significantly lower energy consumption without any compromises regarding the degree of living comfort within the building. Wacker's hybrids offer additional environmental advantages. They are based on Wacker's proprietary alpha-silane technology which offers a unique combination of strength and elasticity. At the same time, the alpha-effect permits the formulation of tin-free silicone hybrids – representing a technological leap in user safety. Wacker hybrid line is free of tin, plasticizers and solvents, which is an additional environmental rationale for modern glass facades." Additionally, high performance sealants and adhesives, based on hybrid polymers are completely VOC-free, as with Wacker's Geniosil range. Thus, hybrids and silicone sealants make a significant contribution to the sustainability of glass fenestration technologies.

Getting the best service

Sealants & Adhesive

The key to getting the best service from sealant application and products is considering factors like wind pressures and thermal stresses at the construction stage itself. Choosing the most suitable product is equally important. "Only high quality silicone sealants offer the adhesion and flexibility profile needed for reliable, long-term protection," cautions Mr Srinivasan. Appropriate application procedure, often a simple one, is equally important. "Most important aspect for any product to stick on to a surface is the surface preparation. In order for the bonding to be strong between the surface and the sealant, the surface needs to be thoroughly prepared. Many of the surfaces which are dirty or greasy would hamper the bonding. Therefore, surface preparation is a must for the durability of a sealant. Manufacturers also offer supply and apply service, where for a specialized application or where the product is expensive and the customer does not want to take a risk by adopting a DIY option, a team of authorized and trained applicators are dispatched to execute the work. This service is not offered at a premium rate and is affordable to majority of customers" adds Mr Acharya.

"High attention for detail and finishing are the key to enjoy aesthetics everyday especially with the ever increasing lifestyle expectations. Finishing at 80-90% level is not acceptable. The aim is to strive for 100% perfect finishing and here lies a huge opportunity," quotes Mr Amit Malhotra. McCoy Soudal's McAademy training application center for sealants, adhesives and foams targets training applicants of sealants and foams to deliver perfect finishing with these products.

Help is at hand with manufacturers setting up customer connects with service and educational initiatives. "In order to enable the construction industry to better address concerns around safety and durability, Dow Corning has recently introduced a program called Quality Bond. This is an innovative membership/ certification program for various stakeholders in the construction and infrastructure market, the objective of this program is to ensure world-class standards for structural glazing and insulating glass manufacturers," according to Mr Padmadas Nair.

How simple is it?

Prestige Palladium Chennai
Besides their utility in entire construction projects, sealants are a part of our homes too. Often the temptation for those ‘busy hands' to take up DIY repairs and projects, is strong. Mr Acharya is encouraging in this direction. "Sealants are available in various type of packing. There are pourable sealants as well as gun grade sealants for horizontal and vertical surfaces respectively. The application of sealants has been made very easy with the help of today's technology. Many of the sealants are available in single packs and are solvent free too, which make the application easy and without skilled labor. Sealants can be applied with the help of putty knife, spatula, fingers or a gun. By taking up a DIY option, the finish is not at all affected as on majority of the sealant packing, the surface preparation and method of application is very well explained."

Product simplicity is also offered in the construction process as Mr Srinivasan tells us. "Silicone sealants for construction purposes are room temperature, one-component vulcanizing, so called RTV-1 systems. This means that they cure directly in the joint, once applied. Curing (drying) is triggered by atmospheric humidity. Basically, there are four different curing systems: acidic, neutral, basic, and aqueous. Each type is based on a different crosslinker. Acidic systems release acetic acid upon curing; neutral systems alcohol or oxime; alkalines create amines; and aqueous systems release water while curing. All silicone sealants provide good to very good adhesion to glass. Due to their outstanding adhesion properties, neutral curing sealants are usually preferred, when substrates like metal (e.g. aluminum frames) or plastic (e.g. PVC) are involved."

Just another friendly way to make sealants a part of your daily environment!
Click Here
To Know More / Contact The Manufacturer
Please provide your details we will contact you as soon as possible
Please let us know your name.
Please let us know your Designation.
Invalid Input
Please let us know your email address.
Please let us know your City.
Please let us know your Contact Number.
Please brief your query.
Our other value-added services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Equipment & Machinery
Invalid Input
Building Products
Invalid Input

Arena Force: Armed With Solutions

India's infrastructure development is booming, which is leading to a huge boom in concrete consumption. We see a huge potential for our products and solutions in this market, where we can provide solutions for new structures being Read More ...

Making Wet Areas Watertight

Waterproofing wet areas has always been a challenging task for the construction industry. With the introduction of the drywall concept, the construction industry is undergoing a change of materials being used to construct these wet areas. This has also created a need for Read More ...
Supreme DURAprotector

DURAprotector– High-performance membrane protection board from Supreme Industries

As the membrane-based waterproofing is gaining credence in the country, the need of manufacturers for protection boards for waterproofing membranes too is increasing. Membrane protection boards are now being increasingly used as a permanent protection Read More ...
Sanjay Bahadur, Pidilite

Quick Makeover With Tiles? It’s Possible!

Tiles are a necessary part of home décor. The colour and pattern of the flooring tile in the living room can add an element of elegance and warmth. Larger tiles, which imply minimum joints, give an impression of larger space. Also, when it comes to the kitchen or bathrooms Read More ...
Dr. Fixit Raincoat Coool

Dr. Fixit’s Raincoat Coool A Waterproof and Insulation Coating

Dr. Fixit, the construction and the waterproofing expert, from the house of Pidilite Ind Ltd, has come up with Dr. Fixit Raincoat Coool – a pioneering new product that provides waterproofing and insulation. According to the company, this is the first such product available Read More ...
3M Extreme Sealing Tape 4412N

3M Offers Extreme Sealing Tape 4412N

The 3M™ Extreme Sealing Tape 4412N tape is a very thick, very tacky, single coated tape that has many potential uses for a wide variety of difficult sealing applications. As a single coated tape, the sealing is generally done by 'over-sealing' Read More ...

Let Your Structure Last Longer

In India currently the seasons and their cycles have altered to a great extent. It was not long ago when we experienced heavy rainfall right during the start of March. This sudden rain was followed by high temperature as a result of which the humidity in the air Read More ...

Sealants are building bonds of trust in construction and allied activities

Looks can be deceptive, as what may appear simple to the naked eye often conceals a medley of traits! The same can be said about sealants, which appear as mere bonding materials used in construction, but in fact are much beyond 'joiners'! Read More ...

Silicone Sealant & Adhesive give longevity to Facades

The architectural appeal of typical commercial buildings is seen in the new projects under-construction that appear in the city skylines. There are more than 60 skyscrapers (height is exceeding 400m) under-building now in China. In China mainland, modern Read More ...

3M™ Extreme Sealing Tape – Nothing Seals Better

Increasingly, as every part of Construction Industry is leaning towards "Green", the roofing is moving towards more light transmittable material. What better way to conserve energy but to allow the natural light into your office, shop or residence through skylights? Read More ...

Modern Waterproofing Group

Modern Waterproofing Group has a long history in the waterproofing industry since 1950s and is providing all types of insulation such as APP & SBS modified Bituminous Waterproofing Membrane, Spunbond Polyester Geotextile, and Extruded Polystyrene Foam Sheets (XPS). Read More ...

Texsa Offers Range of Waterproofing Membranes

Liquid applied membranes (LAMs) were first introduced in the early 1960 and can be broadly classified as Hot applied coatings (SBS modified asphalt) and Cold applied Coatings (acrylics, polyurethanes, polyureas, modified bitumen emulsions). Read More ...

Vast range of Silicone Sealants from Anchor Allied Factory

UAE-based silicone sealant specialist Anchor Allied Factory, which has been present in India since 2011, launched PU sealants and body fillers for cars. The company also showcased its whole range of sealants such as Weather sealants, Structural sealants, acrylic Read More ...

Vinitex - Texsa's New Addition

Vinyl roof membranes are very user – friendly and are installed by a variety of attachment methods. They can be, loose laid and ballasted, fully bonded, mechanically fastened and depending on requirements. Vinyl roof membranes are aesthetically appealing Read More ...

Cost Effective Structural Glazing Tapes

Structural glazing tapes are a small, but integral component in the saga of glazed architecture that is unfolding in India today. Joining systems have been a critical area in structural glazing ever since the advent of this form of construction. While silicone adhesives Read More ...

3M Commercial Graphics’ digitally printed vinyls

Looking for ways to enliven your office spaces? Pleasing colors, motivating ambience and break out areas all contribute to overall higher productivity and employee morale. It is a great way to enhance the corporate image as well. 3M commercial graphics has been transform Read More ...
MGS Architecture

Modern Green Structures & Architecture

Modern Green Structures & Architecture
NBM&CW

New Building Material & Construction World

New Building Material & Construction World
L&ST

Lifting & Specialized Transport

Lifting & Specialized Transport
II&TW

Indian Infrastructure & Tenders Week

Indian Infrastructure & Tenders Week