... :water proofing,fireproofing Item : PU sandwich panelDetails : Polyurethane Sandwich Panel also called PU Sandwich Panel, the up & down surface of this panel is Galvanized & Pre-painted ... /day) 1,000,000m2 700,000m2 700,000m2 800,000m2 --Fire resistancebadgoodgoodnormalgood polystyrene sandwich panel