Zebra Mussel Buster is a safe and biodegradable freshwater scale remover specifically formulated to meet an industry wide need for fast, safe, cost-effective alternatives to mechanical cleaning of cooling equipment. With minimal dismantling required, Zebra Mussel Buster can be safely re-circulated through freshwater water-cooling systems, dissolving zebra mussel exoskeletons, rust, and mineral deposits including removal of calcium and lime scale. Most applications are completed within 4 hours! Zebra Mussel Buster is safe on paint, fiberglass, vinyl, wood, plastics, rubbers, porcelain and most metals if used as directed. ALWAYS RINSE AFTER USEWARNING: Zebra Mussel Buster may discolor copper alloys, aluminum, and some electrolytic plating may occur when circulating between dissimilar metals. Zinc anodes will need to be removed.^Types of Applications: Engine's fresh water cooling systems A/C & refrigeration cooling systems Boat bottoms Piping All types of heat exchangers Bow thrusters Water makers Propellers Pumps