High Insulation Fireproofing Doors

Product Description

- Made from excellent vermiculite fireproofing boards - Its refractory high point exceeds 4 hours. - Vermiculite possesses the characteristic of flameproof, thermal insulation, sound absorption, anti-fungi, etc. - When it is heated to 800 a 1000a for 0.5 a 1.0 minute, its volume will increase to 8 a 15 times, maximum is 30 times, it turns to golden yellow or silver white and becomes loosen inflated vermiculite.