When glass receives heat from fire and the temperature up to 45º C (113 º F), the bloating process it’s activated and makes entirely opaque plate against fire. This process could be activated by high temperatures or excess of ultraviolet rays.

During the fire, the gel is capable to absorb thermal radiation, which stops the energy of fire and keeping the temperature uniformly in the opposite glass face to fire. According to the thickness of the gel, the reaction times against fire are different.