fire-proof, water-proof, sound absorption, heat insulation... Fiber Cement Board is mainly made of Portland cement and silicate materials as base and cellulose fiber reinforced, forming in one time then with high pressure (4000 ton) and fumigation(in autoclave 24 hours),so it has the advantages of high strength, anti- freeze, water-resist, fire-proof, damp-proof, sound-absorption , no distortion ...