Disperses and loosens sludge and grime in the bilge so it can be pumped out. Leaves bilge clean and odor-free. Features: Biodegradable, Easy to use; just pour in, run boat, pump out, Dissolves and eliminates oil, grease, fuel, scum and sludge, Will not harm fiberglass, rubber hoses, wiring, metal or plastic. Bottle: 3785 ml.