Selectaglaze has developed a product that has successfully passed a 30 minute integrity fire test to BS EN 1364-1: 1997 and BS EN 1363-1: 1999. Working in conjunction with Pilkington, Selectaglaze has responded to a need for a secondary glazing system to provide fire protection in vulnerable areas such as windows adjacent to fire escapes.

The use of aluminium systems allows design continuity with other windows undergoing treatment.

Selectaglaze's Fire Retardant Series 40 Fixed Light unit incorporates Pilkington's new Pyrodur glass in conjunction with fire grade mastics and intumescent seals that expand and swell when hot to form a barrier against hot gasses. The design ensured that the unit successfully passed the rigorous fire test using the largest available piece of Pyrodur glass at temperatures (660 degrees Centigrade) which would normally melt most metals including aluminium.