... polyurethane color steel panel, widely used in house, freezing house,clean room,garage door, roof , wall, antifire, sound abosrbing etc, ... performance of fireproofing,sound and heat insulting .Widely used in wall,fireproof door and other buildings with high resisting requirements,places ... material which gives off no smoke and no poisonous gas when exposing to fire. Its bending strenght reaches over ...