Use alone for general cleaning, or as the first step in 3M’s Perfect-It™ gelcoat finishing system with a high-suds formula removes common marine debris without stripping wax from the surface, can be used on virtually all areas of boats from bow to stern, including hull and non-skid areas. Professional-strength concentrate reduces cost. Part of a complete range of Perfect-It™ products for gelcoat finishing. 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 oz. per gallon. 473ml.