Polyurethane sandwich wall panel also called PU Sandwich Panel, the up & down surface of this panel is Galvanized & Pre-painted steel sheets(PPGI), core material is sandwich panels, it is formed by heating, foaming & laminating. Polyurethane is the best material for temperature keeping and sound insulation. It is widely used as the wall or roof for cold storage, industrial workshop, public building etc. | BRD Insulation Panels | Facebook