Gas tank sealer

[Bob Carriere]

Did a weeping gas tank from an Allis Chalmers tractor over 10 years ago.... it was full of pinhole..... tractor still runs and tank has yet to leak.....

Now using POR kits...... multi step but sure seals with a very hard inside coating....only time will tell if it will outlast the early Hirsch coating.

One trick to remember is to make sure the tank is clean of any varnish deposit.... we had tanks with almost 3/4 of solid tar like solid deposit. We foudn that the strongest automotive paint thinner works best...... automotive paint stores will also sell "paint gun cleaner" which is recycled paint thinner distilled from old paint shop gunwash solution. It usually contains a witches brew of MEK, Tuolene, Xylene, acetone and a dash of KiKapoo joy juice....stinks like hell but disolves varnish deposit in 24 hours. Left over best disposed in a deep hole or burned in a trash barrel.

Proceed with the multi step, acid, neutralizing agent.... and stop short of the final coating.

Once dried you can proceed to find potential pin holes.... best done in a very dark room with a 12 volt bulb inserted in the tank....... you will be amazed at all the stars-pin holes you can find. Enlarge the pin hole slightly with dental pick....dimple with a small ball peen hammer and lead solder the dimples and grind flush. Once the coating is done inside you have a good leak proof tank.

Cheers