Seals Tanks against fuels Containing ETHANOL. 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 - Finally, the Fuel Preservative and Stabiliser will prolong the life of your petrol and keep the tank clean. 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 accumulates 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) - 1 x Fuel Preservative and Stabilizer (236ml) 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\" and see how Robert sealed his old fuel tank. Read \"How-To Get Tanked Up with POR15 Fuel Tank Sealer\" and see how Dave restored an old fuel tank for Project 13/30.