FUEL TANK REPAIR is more than just pouring in a quart of sealer and sloshing it around. If gum, varnish, sludge, or fuel are inside, they must be removed first. Our U.S. STANDARD TANK SEALER, like all other sealers, will not work in a contaminated tank. Find out what the pros already know… our FUEL TANK REPAIR KIT has everything you need to do the job right! Kit Contains: MARINE CLEAN to remove gum, sludge, varnish PREP & READY to remove rust & prepare tank for sealer U.S. STANDARD TANK SEALER to permanently seal tank DETAILED INSTRUCTIONS so you’ll do the job right.