Tank Linings

My neighbour is currently building an Indian Scout from boxes of nits and pieces he's managed to find at vintage bike swaps. It seems like a pretty daunting project to me but it's coming along and I commend him for making it happen.

His tank, which has separate compartments for gas and oil, has a very small leak on the oil side. The gas compartment kind of encircles the oil compartment and there's one spot that after time the fuel seems to penetrate. He's been reading up on tank linings but hasn't found an answer he's comfortable with yet. My brother coated an old tank once and it worked great for a few years but eventually showed signs of starting to breakdown. The bike was sold before we could see what would happen. This was a fairly thick, white "goop" that lined the tank.

Just wondering if anyone has a recommendation for something that would last for the long haul and be effective at sealing this small leak up.

Thanks!

Kreem. I used it to seal the tank in the Locost years ago and it's holding up. I did follow the instructions.

Kreem.. blows now it is not safe for modern fuels even there new formula has bad rep. its easy to remove with some MEK it will melt right out.

I've had really good luck with Caswells plantings Dragon blood sealer. If he wants a red liner get dragon blood, they also sell it in clear, black and blue. it is thick and coats well. just be sure to clean clean clean! it can't be clean enough if you want it to last. Be for warned nothing will eat it once its hard so be darn sure you don't get it on anything you don't want coated and if you do mess up your in for a fun time as MEK and even nitro methanol don't seem to hurt it works great on fiberglass too.

I have done a few tanks with Caswell product. The clear stuff. No issues. Hard as concrete. Looks awesome. I have seem creem and the red bike sealer cause all sorts of issues with fuel lines and debris flow and coating stuff with slime. Your results may vary but ill stick with Caswell

Thanks for the input, i'll pass it along.

Anybody seal a old fiberglass tank or a plastic one?

In reply to rdmx:

Why would you need to seal a plastic tank? HDPE is some pretty chemically resilient stuff, I doubt you could get anything to stick to it. Last I checked the only way to repair it is thermal plastic welding. They actually ship alcohol in bottles made of it, and MEK(what PVC cement is made of).

Plastic tanks are tough ones. I don't know of any sealer made for it. the expantion rate is to high.

In reply to Kenny: Yes plastic is tuff stuff but many plastic tanks don't deal well with the Ethanol we now have in gas and they swell and become porus or bloat in to strange shapes.

As for Fiber Glass I use the Caswell in all my fiberglass tanks. On used 2 stroke tanks I fill the tank with boiling water to loosen up the oil from the fibers do this twice then two quick acetone rinses and allow to dry overnight then follow the direction on the sealer kit.