... : white-grey ,sea blue,red, silver, polyurethane sandwich panel (PU)Material: steel and polyurethane Color: red, silver, blue and so ... the PU foamed.The exterior metal sheet can be color steel sheet, galvanized steel sheet , Alu-zinc steel sheet and embossed color steel sheet. 2 ... and gymnasium,villa,cold storage and other building.Product PU PANELThe covering width 900-1000mm The thickness of steel ...