Fuel Tank Repair Instructions

STAYS FLEXIBLE – Will never crack or peel off.

ALCOHOL RESISTANT – No expensive come-backs.

BRIGHT BLUE COLOR – Both you and your customer can see results.

COVERS RUST – Seals old rust in and prevents future rusting.

SEALS LEAKS – Gets the multitude of pin-holes you can’t find.

Northern Fuel Tank Liner is easy to use and effective when the directions are followed closely. It internally seals the multitude of small leaks that often form due to age, rust or where the straps wrap around the tank. If you fix the major obvious leaks, Northern Fuel Tank Liner seals the rest!

Northern Fuel Tank Liner is resistant to gasoline, diesel fuel, alcohol and other fuels or fuel additives. It is designed to seal new or existing fuel tanks with minor leaks.

Contrary to what some people will tell you, rust does form inside gas tanks. The cause is condensation and water in the fuel. Northern Fuel Tank Liner seals rust under the liner

coating so it cannot flake off to plug fuel-line, filters or cause additional damage. Further rusting is also reduced.

1. Empty all fuel from tank.

2. Remove sending unit, float, feed lines, filters, anything that could be clogged by the coating.

3. Remove any loose rust by tapping on the tank with a rubber mallet or by tumbling with a piece of chain in the tank. Flush out debris.

4. Clean tank by using and following the directions of our Northern Tank Cleaner found in the kit or sold separately, part #RW0125-77.

5. Any leaks larger than 1/32nd of an inch should be repaired prior to lining.

6. It is important to make sure that the tank is completely dry before continuing. The use of a blower to circulate air through the tank will cut the dry time substantially.

7. Follow the instructions of our Northern Tank Prep found in the kit or sold separately, part

# RW0125-5. Pour 1/2 of the Northern Tank Prep into the tank, slosh thoroughly and pour

out. On larger tanks you may need to repeat the process with the second 1/2 of Northern Tank Prep. Do not reuse the Northern Tank Prep. Instead let it evaporate safely away from

flames or sparks

8. Cover all open holes in the tank by plugging or covering with tape, except the one to be used for pouring in the coating.

9. Pour Northern Fuel Tank Liner in to the tank, if you are going to completely line the tank you will want to cover the last opening. You can get by with one quart on tanks of about 12

gallons or less. We recommend two quarts for tanks larger than 12 gallons. A pint will typically be adequate for small engine and motorcycle tanks.

10. Tip the tanks onto each side and slosh the coating around to completely cover the inside. Use a rocking motion rather than shaking. It is important to do a thorough job or you may miss parts of the tank behind baffles. You do not need to line the entire tank, only those portions that you wish to repair or seal. If you wish, you may seal the entire tank. If you are installing a new tank it is a good idea to line it prior to use.

11. Drain out the excess Tank Liner. Excess Northern Tank Liner may be poured back into the original container, cover tightly to save for reuse. The best method is to turn the tank so

that the excess liner drains out the main filler opening. Place a receptacle under the drain opening to collect the excess as it drips out. It is very important that you do not leave puddles in the tank.

12. Open all tank openings to allow the best air flow. Air-dry for 8-24 hours. When cured there will be almost no solvent smell left in the tank. If the coating is not completely cured

before fuel is added, the curing process will be stopped. Do not use open flame or an electric element for drying or an explosion may result. Do not blow air into the tank until at least 60 minutes of drying time has passed. Using air sooner may cause bubbles to form in the coating.

12. If the leaks or rust are severe, it is a good idea to use a second coat after the first coat dries completely.

13. Reassemble and install the tank on the vehicle.

14. For clean-up use methyl ethyl ketone, acetone or a quality lacquer thinner with no alcohol in it. Solvents such as methyl ethyl ketone, acetone, methylene chloride and propylene oxide

will dissolve the cured liner if it remains in contact. Other industrial solvents will affect the liner but not completely dissolve it.

Do not leave the can open to the air as it will thicken or form a skin on top. When Northern Fuel Tank Liner is reused after pouring it back out of a fuel tank, it may need thinning before reuse. Northern Fuel Tank Liner may be thinned with M.E.K. or Acetone. Do not use lacquer thinner to dilute Northern Fuel Tank Liner.

For removing water from the tank prior to coating you may use acetone. Acetone absorbs much more water than M.E.K. and is less expensive. We do not sell acetone.

Some shops punch a hole in a corner of the tank to aid in draining it completely. Then they solder in a draincock. Do not solder or weld on the tank after it has been coated. The coating will turn to ash if heated above 250 Degrees Fahrenheit.

Some of our customers have reported a way to speed up the process significantly. They are thinning Northern Fuel Tank Liner about 20-25% with M.E.K. (1 part M.E.K. to 4-5 parts Northern Fuel Tank Liner). This allows the Fuel Tank Liner to dry in only a couple of hours in many cases. They also report that using air to dry the inside does not cause the bubbles that form when straight Northern Fuel Tank Liner is dried with air. You will get a much thinner coating. We are told that two of these thin coats still take less time to dry that one thick coat.

Northern Fuel Tank Liner is not recommended for nonmetal surfaces. Northern Fuel Tank Liner will not adhere to plastic tanks or fiberglass tanks.

Do not coat over other coatings. Remove old coatings completely first, using M.E.K. or other solvent.

The two most common problems are:

1. Not completely drying the tank of water before coating. Northern Fuel Tank Liner will not adhere to and is affected by wet metal.

2. Not allowing Northern Fuel Tank Liner to dry completely. If Northern Fuel Tank Liner is not completely dry or has puddles left, it will not seal or perform properly. Make sure that baffles

and corners are dry and free of puddle Tank Liner.