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 resin should be at the same temperature. If the tank is hotter than the resin, it will cure the resin faster, reducing your working life and coverage. Resins stored in a garage that is 32°C, used at that temperature, would HALF the working time or worse. At 22°C, the material will have gelled in 30 minutes, so it is important to have wetted the tank walls with the sealer within 10-15 mins of mixing.
MOST FAILURES OCCUR FROM IMPROPER MEASURING AND MIXING. You may apply a second application within 24 hours if you want to use up the resin. This is, of course, good insurance on a bad tank, or one with many baffles etc.
In the event that the viscosity is too thick from working in higher temperatures which is inevitable, you can add a small amount of lacquer thinner to the mix (no more than 5% - i.e. 28ml in the motorcycle kit, 56ml in the car kit). This serves to retard the cure cycle and thin the sealer somewhat to allow easier coating coverage.
It is highly recommended that you use only laquar thinners, many other thinners contain chemicals that can react with the sealant.
When you pour the sealer in the tank, it will resemble syrup in the way that it runs, you will need to rotate the fuel tank making sure that every area has a covering, you will find that it sticks very well, and will line the fuel tank evenly. Remove Cling Film seal, and pour out any excess. Allow to drain upside down for a few minutes.
Trim up any excess material as soon as the Fuel Tank Sealer becomes plastic like. This can be scraped out with a sharp knife at this point (usually about 40-60 Min after mixing) Place the tank in a warm 22-32 ° C place and allow to cure for 24-36 hours before putting gasoline in the tank. 4. If you want, or need to apply a second coat, you must do so while the first coat is still tacky (usually within 24 hours) 5. If you can elevate the temperature of the tank to 60°C for 4 hours, this will 'post cure' the resin and the tank may be put into immediate service.