Seals Tanks against fuels Containing ETHANOL. Please note this kit does not contain the Fuel Preservative and Stabilizer or foam brush Use POR-15 Fuel Tank Repair Kit to create a new tank inside your old one. A leaking petrol tank can be lethal, welding a tank is suicidal - this kit will put an end to the need for it. To restore your tank as good as new: - First take POR15 Cleaner Degreaser to remove any old fuel and contaminating deposits in your tank - Secondly prep your tank with POR15 Metal Prep to remove rust, etch the interior surface, and leave a zinc phosphate coating to prevent further rusting - Once the surface has completely dried apply POR-15 Tank Sealer to plug any small pinhole leak Please note that once the tank sealer has been applied you CANNOT re seal over as it will not adhere to itself.   DO NOT PUT LID BACK ON THE CAN ONCE OPENED OR IT MAY EXPLODE! The POR-15 Car Tank Repair Kit kit contains: - 1 x 946ml Cleaner Degreaser (was Marine Clean) dissolve and remove gum and varnish that accumalates over the years. - 1 x 946ml Metal Prep (was Prep and Ready) to remove rust, etch the interior surface, and leave a zinc phosphate coating to prevent further rusting. - 1 x Petrol Tank Sealer (946ml) that will seal up to  18 US Gallon tank / 15 UK Gallon (68L) NOT Suitable for Plastic and Fibreglass Tanks See the \"How Do I Seal a Fuel Tank?\" article in the Technical Articles section Read \"Dolly Springs A Leak\" to see how Robert sealed his old fuel tank Read \"How-To Get Tanked Up with POR15 Fuel Tank Sealer\" and see Dave restore an old fuel tank for Project 13/30.