KBS Tank Sealer Kits: Seal Motorcycle, Car and Plastic Fuel Tanks Up to 100 Gallons

Yes, when the tank is prepped first. The KBS 3-step system cleans the tank with KBS Klean, removes rust and etches the metal with RustBlast, then coats the inside with Gold Standard Tank Sealer. RustBlast leaves a zinc phosphate profile that gives Tank Sealer far better adhesion than a bare or poorly prepped tank. Allow 96 hours of cure before adding fuel.

Use a sealer made for the inside of fuel tanks and rated for the fuel you run. Gold Standard Tank Sealer is formulated for fuel tank interiors, is non-flammable, contains no MEK, and once cured is impervious to gasoline, ethanol blends including E85, diesel, biodiesel and most solvents. Beyond vehicle fuel tanks, it seals oil tanks, air compressor tanks, utility tanks and non-potable water tanks.

Gold Standard Tank Sealer seals pinholes and weld seams from the inside. For exterior pinholes or weak spots, seal the inside first, then paint Tank Sealer over the area on the outside and embed BackBone Fiberglass Mesh in the wet coat. On a plastic tank, patch holes or cracks with NuMetal Epoxy Putty or KBS Patch before sealing.

A motorcycle tank up to 5 gallons takes 8 oz of Gold Standard Tank Sealer, a 5 to 12 gallon tank takes a pint, a car or truck tank up to 25 gallons takes a quart, and a 25 to 50 gallon tank takes 2 quarts. Each amount comes in the matching KBS kit. On rusted surfaces, a quart covers about 100 square feet at 2 mils. See the full sizing guide.

Gold Standard Tank Sealer reaches maximum cure in 96 hours. Leave the tank openings open so air reaches the coating, apply it between 55 and 82°F, and let it air dry in a well-ventilated area. Do not use sunlight or a heat source to speed the cure, because forced curing hurts adhesion.

Yes, with the KBS Plastic Tank Sealer System. Hard plastic and HDPE tanks need Fusion SEP primer first, because Tank Sealer alone will not bond to plastic. The kit includes KBS Klean, Fusion SEP and Gold Standard Tank Sealer. It is not for flexible plastic containers such as portable gas cans.

A PLUS kit adds a quart of KBS Strip to the standard KBS Klean, RustBlast and Gold Standard Tank Sealer. Choose the Cycle PLUS or Large Cycle PLUS kit when the tank still holds an old or failing liner that has to come out before the new sealer goes in.

Yes, if the kit is sized for the total. Prep both tanks first; KBS Klean and RustBlast can be poured from one tank to the next. Then stir the can and pour a fresh portion of Tank Sealer into each tank, resealing the can between pours. Never drain Tank Sealer from one tank into another, because drained sealer is no longer good.

Yes. New steel is too slick for Tank Sealer to grip, and a vinegar-cleaned tank is not prepped. Both need the full 3-step system from the start: KBS Klean, then RustBlast, then Gold Standard Tank Sealer.