So,
I earlier mentioned polysulfide sealant is FAA approved for fuel contact in
my Lake Amphibian. After making that post I read about automotive fuel
tank sealants, there are several.
Certainly they are not so rigorously tested as FAA approved products, but
it seems the manufacturer intends tho
JB Weld: IT IS NOT ETHANOL PROOF. The ethanol melts it. I had the issue
when I used it to seal some "pin hole leaks" in an aluminum tank. Worked
for a while and then leaked. I called the company the makes it and the
nice lady I talked to said it was good to use with everything EXCEPT
ETHANOL..
JB Weld is simply an epoxy product with loaded with some fillers to give it a more viscous wet consistency and a relatively hard finish. I wouldn't use it anywhere you wouldn't consider using any other epoxy resins. If you prep an aluminum (or composite) surface for bonding, you'll find JB Weld, as
I've used JB to seal a couple tiny pinhole leaks in my aluminum tank. This was
years ago and I've had no further problems with leaks. For that matter, J.B.
has worked for everything I've ever used it on. It's been great.
MikeKSEE
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