... and so on.fire rated gypsum board is filled in some addtive in the gypsum core, so it not only have the ... Sound insulation, heat insulation, indeformable,Waterproof, moistureproof, without mouldy effect,Acid and alkali resistance, corrosion resistance,Sawable, drillable, and easy to ... time: within 15 days after receiving prepayment or L/CPackage: in bulk, or pallets, by hand. We can also offer you board ...