Sea Hawk's Sharksin is a 45.2% copper-based, hard modified epoxy paint. Sharkskin aggressively combats all types of marine fouling including barnacles, seagrass, green weed, and other fouling organisms in fresh and saltwater. Epoxy paint can be applied over most antifouling coatings. For use in fresh and saltwater Can be applied over most antifouling coatings | Sharkskin Black Paint, Gallon in Green