Fuel Tank Sealing

First things first, we need to clean it. Start by draining the fuel out, and removing the sending unit and filter assemblies, (if it has an in-tank unit), and all associated fittings. Once the tank is dry, you can knock the surface rust down by using a section of chain and sliding it around inside the tank. Make sure once the chain comes out to rinse the tank clean again. After the tank dries, you can introduce a cleaner and prep agent to seal the remaining rust and also remove the remaining contaminants. Pour half of the 1qt. bottle in and slosh it around, then dump that out. Then pour the rest of the bottle in, and spread that around much like you are rinsing the tank out, then dump it and allow the tank to dry for at least an hour before lining.

To line the tank, tape over all the holes in the tank, except for the one you will pour the sealer in. Tanks less than 12 gallons can be done with 1 quart, but tanks larger than that will require additional sealer. After pouring in the sealer, tip the tank side to side and back and forth slowly, to ensure an even coating throughout the tank. Excess sealer can then be drained and placed into a container for reuse or disposal. It is recommended that you simply turn the tank to where the excess will drain out of an opening into a pan. Once drained, you can remove the tape from the additional opening to ensure maximum airflow. Allow the tank to air dry for at least 8-24 hours