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The right sealants for every glazing job
An average home has about 20 m2 of glazing in the facade. This translates into about 80 m1 of seals, which must be installed correctly!

The right sealants for every glazing job

Durability, energy efficiency and workability to the highest level

Sustainability and energy conservation are hot topics in (residential) construction. Following the example of cavity insulation and roof insulation, the application of high-quality insulating glass is a good way to increase the energy performance of a home. An average home has about 20 m2 of glazing in the facade. This translates into some 80 m1 to seals, which must be applied correctly! For example, to maintain the indoor climate and prevent energy loss through air leaks. The seal also protects against weather influences. 

Zwaluw glazing sealants
Bostik's assortment includes a total of four glazing sealants, with which every sealant need can be met.

Bostik has a complete range of products that take durability, energy efficiency and workability to the highest level and are developed exactly according to the Dutch glazing guidelines.

For the design and construction of glazing systems, NEN 3576 and NPR 3577 are in force. This standard and code of practice cover:

- glazing of buildings;

- new and existing window frames;

- windows and doors made of wood, metal or plastic;

- vertically positioned, imposed on four sides, all around rebated windows;

- With an area not exceeding 5 m2 per window;

- and a maximum thrust pressure of 1.6 kN/m2.

The NPR lists two glazing sealing systems: 

- System K (sealing with elastic sealant, or wet glazing).

- System P (sealing with rubber profiles, also called dry glazing).

For system K, the NPR states that elastic sealants that meet the certification for glazing according to CE EN 15651-2: G-CC with a motion capture and class of 20LM, 20HM, 25LM or 25HM should be used as glazing sealants. On Bostik's glazing products, this certification is indicated on the tube and on the technical data sheet. 

Helpful selection guide

Various elastic glazing sealants are available for sealing glazing. "The choice depends on several factors, such as the requirement for paintability, the type of glass, the size of the joint and the skills of the processor," says Rick Bouhuizen, account manager at Bostik. To make the choice easier, Bostik has set up a product selector with the most important product characteristics. This overview shows at a glance which type of sealant is most suitable for which application.

bostik benelux swallow glazing sealants selector
The Bostik product selector shows at a glance which type of sealant is most suitable for which application.

Bostik's product line has a total of four glazing sealants. The Zwaluw® Hybriseal® 2PS (Two Paint System); a durable and highly elastic glazing sealant for architectural and sanitary applications to which both water-based and synthetic paints adhere excellently. "Zwaluw® Hybriseal® 2PS guarantees an elongation/movement range of 25%, which means that a 4 mm sealant joint can handle a pressure of 1 mm inward and outward," Bouhuizen said. "This prevents the window from cracking or breaking. For example, if a striker is set off in the street at the turn of the year. Thanks to an ISEGA certification, the Zwaluw® Hybriseal® 2PS is also the excellent choice for environments where contact with food is possible."

New to Bostik's product line is the Zwaluw® Window Seal® Easy, which is distinguished by easy handling. "Like the Swallow® Hybriseal® 2PS is also the Swallow® Window Seal® Easy excellent for water-based and acrylic paints," Bouhuizen said. "Also, both sealants have excellent UV resistance. Because the elasticity of the Zwaluw® Window Seal® Easy with 20% slightly lower, it is easier to apply and smooth out." The Swallow® Monustop® was developed specifically for the monument industry where people often want an alternative to putty, but with the familiar look and feel. "The Swallow® Monustop® meets these requirements and is suitable for all types of glass. The sealant is easy to apply and cures quickly, after which it is excellent for repainting with yet another water-based or synthetic paint."

With the Swallow® Window Seal® Plus Bostik also supplies a silicone sealant, which is eagerly used in modular/prefab construction. "The silicone sealant is easy to apply and smooth, after which the sealant remains permanently elastic. The sheet that forms on the sealant also prevents construction dust or dirt from adhering to the sealant. This keeps the joint nice and clean. Even during transport and installation." 

Screenshot 2023 10 31 at 15.04.58
Glaziers, carpenters and modular/prefab builders are welcome to attend hands-on training at the Bostik Academy.

Team of experts by experience

Besides an extensive range of products, glaziers, carpenters and modular/prefab builders are assured of good advice from Bostik, by a team of experience experts. Rick Bouhuizen, for instance, has extensive experience in the world of glazing sealants. After having worked for a glazing manufacturer for some time, he discovered the intricacies of glazing in three quarters of a year. With this experience, he can properly advise the market. Glaziers, carpenters and modular/prefab builders are also welcome for hands-on training at the Bostik Academy.  

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