Rustlok Steel Primer 6980 is an easy to apply, moisture and corrosion proof primer for use on all cast iron and steel surfaces, including galvanized, stainless. Its water impervious barrier offers excellent adhesion and corrosion protection even over rusted surfaces. Recommended anytime an easy to apply, anti-corrosive barrier coat is desired. Use 120 thinner for brushing, rolling and clean-up.