... Fireproof&waterproof &Heat insulation Light acoustic XPS wall 1 Application :UBS Sandwich wall panel EPSapply to a villa ,an apartment ... ,roof ,ceiling;while apply to a mansion as partition wall ,roof ,ceiling ,interior &exterior decoration panel ,thermal insulation ... ,Apartment ,Indoor Stadium ,Exhibition Center . 2 Composition :Sandwich wall panel EPS is with magnesium oxide board as facial surface ...