Aqua-One Performance Ablative is a water-based antifouling delivering solid protection from barnacles, zebra mussels, slime, algae and other forms of marine fouling. The ablative action wears away with use, minimizing build-up and heavy sanding associated with the build-up of old spent coatings. It is fo ruse below the waterline in all waters (salt, brackish and fresh water). Apply Aqua-One Performance Ablative on power and sail boats; fiberglass, wood and properly primed metal boat hulls. Do not use no aluminum.