... of polyurethane between 2 layers (fireproof material). Suitable for varioud roofs and walls referring to the large size factory buildings,storages ... ,exhibition halls,gymnasiums,freezing stores and purification workshops (tempkeeping,heat insulation,weight bearing,weatherproof,rich ... is 0.326mm3.Pu density is 35-40kg/m34.Panel thickness is 20mm,30mm,40mm,50mm,75mm,100mm.