... and plaster board. 2. Performance Our board is made of non-flammable materials, alkali endured epoxy glass cloth, and perlite .it ... The board features being green ,free from smell and poison ,non-flammable ,free from smog ,high intensity, light quality, sound insulation ... Density: 230-250Kg/m Compressive strength: 1.5-2Mpa Water non-absorption ratio :> 95% Bending strength: 0.8-1Mpa Heat transfer ...