Remove tough waterline stains from boat bottoms and hull areas instantly.Unique viscous formula clings to the surface to break down tough grease and oil and remove stubborn scum lines and rust stains.Bold, blue color makes it easy to see where the product has been applied. Just brush it on, rinse it off.Key featuresBreaks down tough grease, rust and oil scum linesJust brush it on, rinse it offSafe on gelcoatsInstant actionFresh scent