Two Component Unsaturated Polyester Putty is used to fill up the dents, cracks, and unevenness of the surface so that the surface becomes uniform and even. The Unsaturated Polyester Putty is applied over primer and offers smooth finish. The Unsaturated Polyester Putty can be applied directly on the metal surface except galvanized iron to fill the surface irregularities, dents, cracks etc. Two Component Unsaturated Polyester Putty can be applied by using putty blade, knife or spatula.