Sherwin-Williams Protective and Marine Coatings Division announces new SeaGuard Heavy Metal Free Antifoulant, an environmentally responsible alternative to copper-based hull coatings that prevents the growth of marine organisms on commercial and military ships. The new product received U.S. EPA approval on June 30, 2008. SeaGuard Heavy Metal Free Antifoulant is a solvent-based ablative coating that utilizes a metal-free organic biocide agent and provides the same effective antifouling protection as traditional copper-based coatings.