Kreem Fuel Tank Liner Combo Pack Kreem Fuel Tank Liner Combo Pack is designed for use as a preventive maintenance product in metal tanks new and old containing gasoline, gasohol, or diesel. Kreem Fuel Tank Liner has a unique formulation with extremely rapid set-up that prevents leakage from hairline cracks and seam pinholes by coating the tanks inner surface with a fuel resistant elastomer. Features: Works for all metal gas tank repair needs Tank Prep Kit: Prepares a metal gas tank for sealing Includes Fuel Tank Liner, Tank Prep A (a concentrated cleaner), and Tank Prep B (a final rinse) Kit removes loose rust and dirt inside the tank and conditions surface for tank sealer Fuel Tank Liner: Produces a tank within a tank Cures to a tough, elastomer compound that seals and protects any metal and some fiberglass tanks Resists alcohol and gasohol and withstands most octane boosters Small treats up to a 3 gallon tank large treats up to a 5 gallon tank Note : NOT compatible with all fiberglass or plastic tanks.