... exhibition halls,gymnasiums,freezing stores and purification workshops (tempkeeping,heat insulation,weight bearing,weatherproof,rich color and good appearance).3. PU ... for the protectivve structure. Good temp-keeping and hest insulation.Fine fireproof:test by national quality inspection center for fireproof ... is 0.326mm3.Pu density is 35-40kg/m34.Panel thickness is 20mm,30mm,40mm,50mm,75mm,100mm.