Kit contents: Epoxy pouch, fiberglass cloth, sandpaper, application brush and mastic. Tank repair kit: Formulated to repair plastic, metal and composite tanks. Ideal for repairing leaks from splits, pinholes, rust-outs, cracks and holes up to 1/2" diameter. Useful for autos, trucks tractors and RVs. Repair radiator tanks, fuel tanks, oil pans, waste tanks and more. For Coolant, Fuel & Radiator Tanks Bonds: Plastic, Metal & Composite Tanks Fuel, Water and Chemical Resistant 1,500 psi Strength Stop Leaks