3M™ Perfect-It™ Boat Wash is an important first step in achieving a truly professional gelcoat finish. This high-suds formula works without stripping wax, removing grime, algae, dirt and other common marine contaminants to create a clean, clear surface for refinishing. In fact, it works on every boat surface from bow to stern. And its concentrated formula requires only 1 ounce per gallon. For a truly professional gelcoat finish, our 3M™ Perfect-It™ Boat Wash works by itself or as the first step in 3M's Perfect-It™ gelcoat finishing system. This boat wash features a high-sudsing formula that removes even stubborn marine contaminants such as grime, algae and dirt from gelcoat and other surfaces, yet it's gentle enough not to strip wax away.