Removes mold, mildew, rust stains and more! Boat-D-Funk is versatile. It will remove stubborn mold and mildew, rust stains, dirt, grease, etc. It will keep everything in your boat looking new and smelling fresh! Safe for live wells; environmentally friendly. Boat-D-Funk is not only remarkably effective, it's also environmentally friendly. It's even safe to use Boat-D-Funk in your bait well and live well! The unique formula is free of bleach and harsh chemicals so you can use it on-board with no concerns.