Black Powder Applications, Can Be Used To Repair, Fill And Reinforce Hard Plastics And Metals Such As Bumpers, Grills, Radiators, Side Mirrors, Door Handles, Distributor Caps And Much More. Grey Powder Applications, Can Be Used To Repair, Fill And Reinforce Hard Plastics And Metal Surfaces Such As Cracked Metal And Plastic Casings On Automobiles And Motorcycles With Temperature Resistance Up To 180 Degrees Celsius, Damaged Wheel Covers, Laptops, Pool Pumps And Much More.