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