Frp and polyurethane foam sandwich panels 1, Excellent price and quality 2, Light weight 3, Easy installation 4, ISO90 ... -resistance, noise-absorbing2. Fire resistance raring: NoneUsage:This kind of sandwich panel can be used in steel structure workshop, easy ... 1. Composition: Core materials: EPS, XPS,Rok wool, Glass wool,PU, PUR Surface materials: PPGI, GI, Stainless steel sheet, galvalume sheets ...