... fireproof, moisture-resistance, high strength and light,anti-deformation, non-toxic,heat insulation, sound insulation, anti-aging, mothproof, easy to install, enviromental friendly ... material 100% no Asbestos Contained and no radioactivity .CompositionThe materials of magnesium fireproof board are Magnesia(MgO),Magnesium Chlorid(Mgcl2)and Alkali glass fiber ...