Seals Tanks against fuels Containing ETHANOL. Please note this kit does not contain the Fuel Preservative. 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 POR-15 Marine Clean to remove any old fuel and contaminating deposits in your tank, - Secondly prep your tank with POR-15 Prep and Ready (formerly Metal Ready). - Once the surface has completely dried apply POR-15 Tank Sealer to plug any leaks. 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: - 2 x 946ml Cleaner Degreaser (was Marine Clean) - 1 x 946ml Metal Prep (was Prep and Ready) - 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 the \"Dolly Springs A Leak\" article to see how Robert sealed his old fuel tank. Read \"How-To Get Tanked Up with POR15 Fuel Tank Sealer\" and see how Dave restore old fuel tank for Project 13/30.