... sandwich panel 1)thick:50mm 100mm 150mm 2)steel layer:ppgi and ppgl mainly 3)capacity: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- ... ,000m2 700,000m2 800,000m2 --Fire resistancebadgoodgoodnormalgood polystyrene sandwich panel