Rust-Oleum 249321 Primer Sealer Gray Aerosol 12Oz, 12-Ounce For use on metal, fiberglass and other surfaces Stops Rust Formula prevents corrosion and rust Any-angle spray technology allows the can to be sprayed in any direction, even upside down When applied over a Rust-Oleum Automotive Primer this product also prevents top coat paint from soaking into the primed surface. Bonds base coats