Pettit Rustlok Steel Anti-Corrosive Paint Pettit Rustlok is a one package moisture cured polyurethane coating designed for application over any steel or cast iron surface, including galvanized and stainless steel. Rustlok Steel Primer contains aluminum flake pigment which forms a dense, water impervious barrier. The result is excellent corrosion protection. In addition, Rustloks polyurethane chemistry offers tremendous adhesive strength and wetting ability. It is this combination that allows Rus