Duralux Urethane-Alkyd Marine Enamel is a single package topside enamel for use on primed steel and metal, wood, aluminum or fiberglass. It is designed for use on commercial or pleasure boats, as well as on & offshore oil rigs, bridges, tanks and other structural objects. Duralux Marine Enamel is salt water resistant, withstands repeated washings, resists oil and gasoline and holds up to the discoloration effects of harbor gases.