An alternative to tin-based paints, Sea Hawk's Biocop guards against the harshest environments with maximum protection. This revolutionary polymer binder "PL3" produces an engineered biocide with no harm to the environment. Dual biocide is a top performer in fresh or saltwater on boats of all sizes. Maximum protection for your boat Works well in fresh & saltwater | Sea Hawk Biocop Dual Biocide Marine Paint, Gallon in Blue