Hammerhead Marine Descaler is an advanced chemical solution designed for cleaning critical components where metal sensitivity matters.This BioPreferred formula is safe on aluminum, titanium, stainless steel, copper and much more. The duel action formula degreases while it descales saving time and money. The flexible nature of Hammerhead Marine Descaler allows it to be used in both a parts cleaner and direct applications onboard. Hammerhead Marine Descaler's aluminum safe formula is a safe solution for removing corrosion and calcium minerals from Outboard Engines. It is ideal for keeping on board for that added measure of cooling protection. Makes up to 4 finished gallons per gallon.