Fuel Tank Sealer

item(s): 49216


POR-15 Fuel Tank Sealer

POR-15 Fuel Tank Sealer was formulated and developed in our own laboratories due to the demand for a high-tech sealer impervious to all fuels, including the new Stage II fuels which have a high alcohol content. This gas tank sealant has superior strength and fuel resistance. Also, this gas tank liner stops rust, corrosion, and small fuel leaks. 

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 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 42 reviews
Love Por

Did 2 tanks at once, one was small but both sealed real good. Very pleased with all Por products.

It does exactly what it says on the tin.

I had a small fuel leak from the swirl/sump fuel tank on my 79 Jaguar XJs.
I used POR 15 fuel tank sealer, followed the instructions, it worked perfectly.

Kevin Eby

Fuel tank sealer and cleaner worked great great service got my first gallon leaked all over the inside of the box called and they sent me a second gallon free of charge

Angel Aquila

Fuel Tank Sealer

Webster E Baker

Very pleased with the service. When I was unable to re-install the lid, you shipped me a replacement.

I used the product to put a light coat on a carburetor brass float that was leaking. Problem solved so far.

- 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.