This type of glass is divided into following classes:
1. Integrity Е
Glazing can withstand flame and gases penetration to unexposed glass face withing 30, 60 minutes. Certified classes E 30, E 60.
2. Insulation ЕI
Glazing with same properties as Integrity (E), but with additional function for reducing the temperature rise on unexposed glass face to temperatures set by standards: EN 1363-1, EN 1364-1.