Fuel Tank Liner

[marcmax]

I'm getting ready to prep a replacement fuel tank for my 82LS. I have read all the threads about how to clean the tank and get it ready. What I would like is anyone's opinion on what to use to reline it. I have heard too many bad things about Kreem so that is out of consideration. I know POR15 seems to be a popular choice. I called the independent BMW shop I use to order parts and he recommended a product called Caswell that is a two part epoxy. He does concourse grade restorations and said the only problem with Caswell is that it is clear and not red like the factory liner. Anyone have any useage experience with Caswell or POR that they are willing to share?

http://www.caswellplating.com/aids/epoxygas.htm

[Bob_Roller]

I used  POR15, once the tank is free of rust and old liner material, it's as simple as pouring it into the tank and rotating the tank until all of the surfaces are coated, the drain tube that goes from the fuel cap area to the bottom of the tank, was the hardest to get coated .

I used rubber stoppers to close up all of the holes, you can get one large enough to plug the fuel cap area .

If you have a home wine-making and brewing store near you they usually stock the correct size .

But even with that, I was done in less than 5 minutes .

It's a quite strong smelling material on the lines of rattle can auto paint, do it outside or in a well ventilated garage .

[Ed Miller]

I've used both, but I actually haven't put gas in the Caswell lined tank yet.  The POR15 has only been in my Triumph small tank for a few years but it seems to be holding up fine.  It was pretty easy to use; I got the kit.  I had my tank hot tanked first so there was little if any rust left before I even started the POR15 application sequence.

The Caswell may actually be tougher stuff, more resistant to chemicals but don't try to apply it on a cold day.  It was flowing like slightly runny honey the day I used it and it took a long time to convince myself that I had applied it to the entire inside of the tank.  Mine didn't come with the cleaner/de-ruster package like the POR15 but again I had my buddy hot tank that tank before starting, so there wasn't any rust left.  His hot tank is caustic soda, removes paint and most rust.  I would love to have easier access to one but I don't want 50 gallons of hot draino on my property!

[DgM]

Stripped, repainted tank for 1983 R65.  Had tank stripped of paint and rust in hot tank at L&M in Van Nuys, CA (818 983 1200).  Picked up tank clean as a whistle, seams apparent, good deal, quick.

[marcmax]

I think I have settled on the Caswell epoxy liner. Everything I have read about the POR15 makes it sound like it is critical to have the tank interior perfectly spotless or there may be issues with a good bond to the tank. The Caswell epoxy actually states that it bonds well right over and encapsulates any remaining imperfections in the tank interior.