Starbrite Bilge Cleaner 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 Directions Pour entire contents of bottle into bilge Use one bottle for every 25' of boat length If bilge is dry, add several gallons of water Allow Bilge Cleaner to remain in bilge while running boat for a minimum of one hour After running boat, drain or pump out bilge in accordance with local regulations Repeat once a month or as often as necessary to keep bilge clean and free of odors