Many fire-resistant glass types with heat-absorbing interlayers are sensitive to direct or indirect UV radiation. Over time, this may lead to the appearance of: discoloration, yellowness, haze, cloudiness, as well as the formation of bubbles or even delamination. While its fire resistance performance might well remain unaffected, the glass may become visually undesirable even over a comparatively short period of time.
EN ISO 12543-4:2011 is the test method for the durability of laminated and laminated safety glass, which includes “fire-resistant” laminated glass. All such products must demonstrate resistance to: high temperature, condensation from high humidity, and UV radiation simulating natural sunlight. Although UV resistance is typically only measured for products for external use, internal applications are also often exposed to direct or indirect natural light.
We tested our standard CONTRAFLAM make up to 5000 hours, without any additional special UV protective films or solar reflective coatings. The test method calls for just 2000 hours of resistance to UV radiation. Hence, our product successfully endured 2.5 times longer exposure to UV radiation than the normative requirement!
Exceptional UV resistance and durability are major contributors to longer product life-cycles and the reduction of total cost of ownership. CONTRAFLAM’s reliability and multi-functionality are among the qualities that have made it the industry’s benchmark.
Download below a summarized test report from TÜV Rheinland, which describes and confirms the exceptional UV resistance of CONTRAFLAM fire-resisting glass far beyond the normative requirements.