Rust Converter is a liquid surface conditioner and primer that converts existing rust into an inert, protective coating that seals out moisture and corrosion. Unlike other products, it is not a simple cleaner or cover-up. The special formula attacks rust at the chemical level, for fast, long-lasting results. Treated surfaces turn matte black, and can be left as-is or painted with an oil-based paint for even longer protection against new rust. Ideal for treating smaller surfaces, with a brush or roller, or spraying directly from the bottle.