4Bird® Etch is glass with an acid-etched pattern applied on position #1, combined with a selected COOL-LITE® coating designed for tempering. The patterns are durable, subtle for building occupants, and compliant with international bird-friendly glass criteria.
All available 4Bird® Etch configurations have been evaluated and certified by the American Bird Conservancy (ABC) as bird-friendly glazing.






4Bird® Frit is glass with a printed ceramic pattern applied on position #1, #2, or #3 (and on position #4 for laminated glass). It must be combined with COOL-LITE® coatings, available in both annealed and temperable versions.
All available 4Bird® Frit configurations have been evaluated and certified by the American Bird Conservancy (ABC) as bird-friendly glazing.





Vitroterm-Murów S.A. has received a recommendation from Saint-Gobain – one of the global leaders in the architectural glass industry. This distinction confirms our expertise in the production of insulated glass units using 4BIRD® Frit glass.
These solutions comply with the stringent guidelines of the American Bird Conservancy, effectively reducing the risk of bird collisions with glass while maintaining a high level of façade aesthetics.
The Saint-Gobain recommendation is a testament to the quality, precision, and experience of Vitroterm-Murów in delivering demanding architectural projects.
At Vitroterm-Murów, we offer glass certified by the American Bird Conservancy (ABC). This certification confirms that the glass has been tested in accordance with ABC guidelines and effectively reduces the risk of bird collisions with glazed surfaces. This is essential for window manufacturers and construction companies delivering projects on the U.S. market, where many cities and states require bird-friendly solutions compliant with ABC criteria.
At Vitroterm-Murów, we specialize in manufacturing insulating glass units using bird-friendly glass. As one of the market leaders, we offer proven and effective solutions that help protect birds from collisions with glazed façades.
Our long-standing experience and highly skilled team enable us to fully understand the challenges and requirements of architectural projects—especially in the demanding U.S. market, where we have successfully completed numerous projects.