Patented product. Light own weight, high impact strength, sound insulation, fire proofing, water proofing, heat insulation. Features: ... and soft properties. And this characters the wall of high strength, low weight, thermal preservation, energy saving, fire proof, ... Technical parameters and performance:ItemUnitIndexSelf weightKg/sq.m≤60Impact strength No cracks for 30kg sandbag impacting by 5 times ...