Sealing windows and doors

Properly sealing windows and doors is more important than ever today. Energy efficiency, living comfort, and sustainability are central to every construction and renovation project. As a Belgian manufacturer with over 90 years of expertise, DL Chemicals has long been a trusted name in high-quality sealing solutions for windows and doors – one of our absolute core applications.

To further support professionals, we have bundled all products, systems, and technical knowledge related to window and door sealing in one clear and practical brochure.

One complete guide to window and door sealing

The new brochure "Sustainable Sealing for Windows and Doors" offers a clear overview for both new construction and renovation projects. It guides fabricators, installers, and specifiers through every step of the process: from production and installation to airtight finishing.

In the brochure you will discover, among other things:

  • The DL Window and Door System with sealing on three levels (inside, center, and outside)
  • Solutions for airtight construction, thermal and acoustic insulation;
  • Clear product overviews for windows and doors;
  • Practical guidelines and technical detailed drawings for correct installation;
  • The right combination of sealants, PU foams, adhesives, and sealing tapes.

This way you can quickly and correctly choose the right products for a durable and high-performance window and door connection.

Launch of 5 new sealing tapes

Along with this brochure, DL Chemicals is also introducing five new sealing tapes that perfectly meet the stricter requirements for energy performance and air tightness:

These sealing tapes, together with existing products, form a total concept for window and door sealing, tailored to today's practice.

Practical application video: our products in action

In addition to the brochure, an application video is also available that perfectly complements the DL Window and Door System. This video shows you how to properly seal a window using the right combination of products.

Everything bundled: products, knowledge and expertise

With this new brochure and application video, DL Chemicals underscores its role as a knowledge partner for professionals. By combining high-quality products with clear guidelines and system solutions, we help construction professionals seal windows and doors sustainably, airtightly, and for the future.