Knowledge Base: Fuel Tank Sealer & Restoration

  • Process For Our Fuel Tank Renovation Kits

    Remove Old Tank Seals, De Rust and Coating Metal Fuel Tanks Whether you have a Car, Motorcycle, Tractor or Garden Machinery or any item that has a fuel tank that holds petrol, diesel or a derivative of these, you will know the problem of rust and its destroying nature.

    Modern fuels can also cause problems with fiberglass/composite tanks, as the resins are susceptible to attack by the chemicals put in to the modern lead free petrol that is sold nowadays Fuel tanks made from steel are susceptible to rusting. In the past when leaded fuels were in use, the problem

  • Identify Ethanol Problems In Fibreglass, Plastic, Carbon Fibre Tank

    Modern fuels cause problems with Fibreglass and Composite tanks, the resins that are already in the fuel tank structure are susceptible to attack from the chemicals that are now in modern fuels, normally this presents itself by the fuel tank becoming porous.

    The visual signs for this are the following

    1. Strong smell of fuel on the outside

    2. Decals and stickers start to shrivel, or bubble up, and eventually come of

    3. Paint will start to bubble, and discolour similar to below.

    Once the tank has been prepared and then Caswell Fuel Tank Sealer applied this will solve the

  • Prepare Fibreglass/Plastic/Carbon Fibre Tank Before Sealing

    Firstly before preparing you need to identify if the fuel tank has ever had a tank seal fitted in the past, this will need to be removed before you apply the sealer, there are a number of ways to identify this.

    1. The most extreme cases will be the fuel tank sealer starting to bubble as per the image

    2. You may start to find small flakes of a varnish type material in the Carb Bowl, theses will also block the jets in the carb, so you may notice issues with how smoothly the engine runs.

    Its not possible to

  • Plugging Petrol Tap And External Holes Before Sealing

    Before applying the fuel tank sealer, you will need to plug up external holes, for this there are many ways of doing this with simple household and Garage items.

    For the fuel tap, you can use a bolt, putty/play doh, Cork/Silicone or Rubber plug, anything that will extend into the fuel tank, so that the sealer only goes around the bung and not cover it.

    Any Breather or outlet port can be sealed in the same way.

    If you have any damage or holes in the tank, cover with duct tape to stop the sealer coming out, when the sealer

  • Applying The Fuel Tank Sealer

    If the inside of your fuel tank has a shiny surface, it would be good to key or scratch the inside to give a good grips surface for the resin, its not essential, but always good to do.

    Mixing ratio is 2 parts of A to 1 part B. Fuel Tank Sealer, both resin and the fuel tank should be at room temperature.

    Resin colder than 21°C will make resin thick and not flow well, hotter than 30°C will make it runny, so it doesn't stick to the sides well and it will cure too quickly. The tank and the

  • Remove an Existing Tank Sealer

    Many fuel tank sealers that claim to be Ethanol are now proving not to be, each day we have many customers who have used POR15 and Kreem and the product has now failed.

    You will need to remove the old seal before you are able to apply a new Ethanol resistant seal to the fuel tank.

    If possible remove the fuel tap, this is just in case the tank seal remover gets into the rubber components within as it will damage them.

    Block any breather holes, and remove any internal fuel pumps, or mechanicals that are fitted for the fuel