Pilkington Pyrostop® fire resistant glass is composed of Pilkington OptiWhite low iron glass for the best optical clarity and high visible light transmission, is classified by Underwriters Laboratories for 45, 60, 90 and 120 minutes, and is Cat II human impact rated by the CPSC.
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Fire-Resistant Glass
Pilkington Pyrostop®
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Certifications for Fire-Resistant Glass - Pilkington Pyrostop®