... easy installation ,deadening... Specifications high strength, freeze-proof, water-proof, fiber-proof, sound-proof and non- deformation. Used as ceiling, ... size600x600x5mm-6mmMaterials: Tobermorite, cement, Quartz sand, reinforced fiberFire-proof rate: A-class incombustible (GB8624-1997)Incombustibility: 180 ... plywood fancy plywood and film faced plywood slot board to many countries, and each year the ...