Permatex's Fuel Tank and Radiator Repair Kit features a two-component stick that, when kneaded together, seals holes, seams, or cracks on metal tanks, radiators, or gas cans. It provides excellent chemical and moisture resistance and is non-flammable. This repair resin is designed to cure within two hours and can be made ideally at temperatures from 50 degrees Fahrenheit to 75 degrees Fahrenheit. Repairs made at lower temperatures will take longer to cure. Read all directions before beginning repair. This repair kit is recommended for us on fuel tanks, metal tanks, and radiators. It is not recommended for use on plastic gas tanks.