The Versachem Heavy-Duty Fuel Tank Repair Kit permanently repairs gasoline and diesel fuel tank leaks in less than 20 minutes. Use it to repair pinholes, rust-outs, hairline cracks, and holes up to 1/2" in diameter. Resistant to water, gasoline, diesel, and kerosene. No draining and no welding required. Have the repair ready before mixing the hardener and resin together, so that you can begin repair as soon as the pouch contents are thoroughly mixed. Heat is generated while the epoxy mixture cures. Works best on metal and plastic tanks, fuel tanks, and oil pans. Tensile strength: 1500 PSI; temperature range: 40F to 200F.