... deforming, nontoxi 3.fire-proof 4.beautiful EPS foam sandwich panel:1.characteristics: light dead weight ... foam board(EPS), Color steel sheetStructureUpper and lower layer: Color steel sheetMiddle: polystyrene foam board or polyurethane foam boardThicknessColor steel sheet ... ,Spangle,Fingerprint Resistance.ApplicationGeneral Use,Roofing, Corrugated Roofing Making,Outside of the buildings,Structure ...