There are two basic criteria governing a glass fire resistance rating:
the flame retardant criterion (integrity, low radiation);
and the fire-retardant criterion (integrity, total isolation).
Pyrobel - Pyrobelite : fire-resistant glass assembled using two or more intumescent interlayers which expand in the event of fire.
Pyropane:toughened flame-retardant glass.
Wired glass: glass offering a basic level of fire resistance (may or may not be authorised depending on the country).
Fire-resistant glass is classified according to its performance rating (duration of resistance to fire and type of insulation). The choice depends on criteria relating to applicable legislation and in line with the end use of the glass.