Fuel Tank Sealer

item(s): 49216


POR-15 Fuel Tank Sealer

POR-15 Fuel Tank Sealer was Formulated for metal and developed as a high-tech sealer that is impervious to all fuels, including the diesel, E10 ethanol, and high alcohol content fuels. This gas tank sealant comes in a silver color and has superior strength with fuel resistance. Also, this gas tank acts as a liner and stops rust, corrosion, and small fuel leaks. Fuel tanks must be free from plastic parts, contamination, and be structurally sound before applying sealer. Gas tanks should be free from loose rust, old sealers, cleaned with POR-15 Cleaner Degreaser, and etched with POR-15 Metal Prep for best adhesion.

Color: Silver


  • 8 fl oz is enough to coat the inside of a 6 gallon fuel tank
  • 32 fl oz (quart) is enough to coat the inside of a 25 gallon fuel tank

Formerly U.S. Standard Fuel Tank Sealer

- POR-15 Fuel Tank Sealer Technical Data Sheet

Step-by-Step Restoration

Before Fuel Tank Repair
Before: This fuel tank had small pinhole leaks on the end near the seam. If the tank had a competitors old failed sealer, it should be removed with POR-15 Strip Gel before starting the repair process.
Step 1 fuel tank repair
Step 1:Mix 1 quart of POR-15 Cleaner Degreaser with 1 quart of hot water. This solution will be used to remove any gum, varnish or sludge from the inside of the tank.

Step 2 fuel tank repair
Step 2: Pour the entire bottle of POR-15 Metal Prep to dissolve rust, coat the tank with zinc phosphate, and etch the metal for better adhesion of the sealer.

Step 3 fuel tank repair
Step 3: After the tank is clean, drain the tank and rinse thoroughly with water. Let the tank dry. When totally dry, pour in the entire can of Fuel Tank Sealer.

Step 4 fuel tank repair
Step 4: After all surfaces have been coated, drain the tank for about an hour to remove excess sealer from the tank.
Completed fuel tank repair
Step 5: Once repaired, use fuel preservation & stabilizer to keep your entire fuel system in proper working order and to avoid "stale gas" problems in your future!

Customer Reviews

Based on 64 reviews
Armando Pena

Great stuff everything worked out good.

kurt andrews

Been using g for yrs,no issues

Ralph Finley
Gas tank sealer

I haven't used it yet, but I have used it in the past and it has held up fine for 6 or 7 years. Every time I look into the tank it is a pretty light gray color about the same as it was the day I applied it then to a 1964 IHC dump truck that I use maybe once or twice a year. I am now going to seal 3 smaller tanks on 3 different tractors in a couple of weeks. They all are rusty and causing the fuel filters too plug requiring filter changes at inconvient times.

Roger Cooley

Absolutely fabulous!! Easy to use. Used a hairdryer to dry out the tank.

Russell Farmery
Easy to use

Purchased a kit with 2 small 8oz cans of paint for a Triumph GT6 tank. The instructions are detailed and easy to follow, be prepared for a few hours work to do this properly. The results look great and the "peppering" of the metal where they're was a rust spot is now totally smooth, you would never know rust was even there.
I used a hairdryer on low between the metal prep and the actual paint.
I was also worried that 2 x 8oz cans would not be enough but there was plenty to go around.
It's been over a week and it's time to refill with fuel, goodbye blocked fuel filters.....

- POR-15 Fuel Tank Repair Kit Directions

It is important to understand each product in your repair kit and how it works. Proper chemical interaction is essential for achieving the best possible bond of the sealer to the inside of the tank. Fuel Tank Sealer does not adhere well to plastic. If your fuel tank contains plastic components inside, they should be removed before applying Fuel Tank Sealer.

Please remember these instructions are general guide lines only and cannot and do not cover every application and environment. If you remain unsure as how to proceed, please call toll-free for technical advice at 800-457-6715.