POR-15 Fuel Tank Sealer - 8 oz POR-15 Fuel Tank Sealer - 16 oz POR-15 Fuel Tank Sealer - 1 QT POR-15 Fuel Tank Repair Kit - Automotive - 1 Qt - Car & Truck Gas Tank Repair POR-15 Motorcycle Fuel Tank Repair Kit - Seal Small Gas Tanks

• Tanks may be very rusty inside due to years of non-use.
• Tanks may have gum, varnish, or caked sludge deposits inside, which-must -be removed before sealing can be done.
• Tanks may have pinhole leaks or leaking seams.
• Tanks may have a combination of the above.

Q. CAN TANKS BE TREATED WITHOUT REMOVAL FROM VEHICLES?

Usually not. Occasionally a tank will have a small leak on the bottom which can be treated without removal, but that is the exception. Proper fuel tank sealing almost always requires tank removal from the vehicle.

Q. YOU CLAIM U.S. STANDARD FUEL TANK SEALER IS 'THE BEST FUEL TANK SEALER MONEY CAN BUY'. WHY IS IT BETTER THAN OTHERS?

A. It's better because it seals pinholes and seams with a non-porous film barrier that won't crack, chip, or peel. Other sealers are little more than paint or adhesive-type coatings with little or no intrinsic film strength.

U.S. STANDARD SEALER puts a moisture-proof barrier between the tank walls and the fuel.

Q. DOES US STANDARD FUEL TANK SEALER CONTAIN 'RUST INHIBITORS' THAT OTHER SEALERS CLAIM TO HAVE?

A. Any chemical can be called a rust inhibitor, since practically all coatings will stop rust for a short period of time until they are eaten away by moisture or wear and tear. Some oils will inhibit rust for a limited period of time, also. But the only real way to stop rust permanently is to keep moisture away from metal with a non-porous coating that is strengthened by exposure to moisture. Only U.S. STANDARD FUEL TANK SEALER does this, and that's why it's the best product.

Q. HOW MANY TYPES OF FUEL TANK SEALER ARE THERE?

A. There are two basic types of tank sealer other than U.S. STANDARD, and they are similar to each other in basic structure:

1. PVC type sealer is similar to the adhesive used to seal PVC pipe as used in waste disposal lines, sewer lines, etc. This material is white in color, coats well, but doesn't fill holes or seams well because it has poor film strength and is essentially an adhesive rather than a coating. It is highly flammable and has strong ketone vapors which are dangerous to people with heart conditions.
2. PVC-type non-curing sealer is yellow in color and will dissolve in gasoline con.tain.ing alcohol and other additives, which makes it dangerous to use in ANY gas tank. Adheres well but never dries fully, and it can easily be scratched off with your fingernail. Contains highly hazardous ketone solvent M.E.K.

A. If tank contains sludge, gums, varnishes, or rust due to years of neglect or non-use, it should first be cleaned thoroughly with POR-15 MARINE=CLEAN to remove all foreign matter. Mix 1 quart MARINE=CLEAN with 1 quart hot water, put in tank for 24 hours and agitate frequently. Repeat process until tank is clean. Next, use POR-15 MET§AL-READY to etch inside surface of tank and to remove all rust. Next, rinse tank thor.ough§ly with water several times to remove all remnant chemicals and dry. TANK MUST BE BONE DRY INSIDE BEFORE USING U.S. STAN.DARD FUEL TANK SEALER. Use a hair dryer or other blower to insure tank is completely dry before sealing.

Q.MUST I ALWAYS USE A FUEL TANK SEALER AFTER THOROUGHLY CLEANING OUT MY TANK?

A. No. Fuel tank sealer should be used as a last resort, and is not always necessary. Fuel tanks that are rust-free and have no pinholes or leaks may not need sealing at all. They should, however, always be kept full of fuel, which prevents condensation and further rusting. If vehicles are not used frequently, fuel tanks should be treated with POR-15 FUEL PRESERVATIVE/STABILIZER, which will keep fuel fresh for two years or more and insure quick starts even after months of non-use.

Q. CAN U.S. STANDARD FUEL TANK SEALER BE RE-USED?

A. No. Used Fuel Tank Sealer should be discarded because it absorbs moisture from the atmosphere during application and will not adhere properly a second time.