Majority of the industrial sheds and warehouses have GI sheet roofing. These roof sheets are fixed with J bolts and nuts. Over a period of time these joints gets rusted and the holes gets widened. Spray Applied Polyurethane is used to form seamless and fully bonded water proofing layer as well as heat insulation covering the entire sheet roofing. This foam seals all the joints and the holes of bolts. The Polyurethane foam is then covered with an acrylic UV resistant coating which results in long life of the foam.