Seal-All Fix
Join the club !!! I'm going to try first sealing from the outside (with copious preparation of the AL surfaces.
My -6 started to leak last October. 938hours on it. I bought some SEAL-ALL (contact adhesive and fuel sealant) in a yellow tube designed to seal fuel leaks even when wet with fuel.
Ran the tank down until the fuel level was below the rivet that was leaking. Temp when applied was 41 deg F. Using nitrile gloves, put a small dab on my finger and applied a very thin layer over the leak area on the outside of the skin.. After two minutes it was hard to the touch. Full cure in 2-6 hours.
I let sit for a week, then filled the tank. No, leaks. Still not leaking as of yesterday when I was at the RV installing my wheel pants.
BTW-I did not prepare the paint or aluminum, just applied it to the skin over the leaking rivet head.
If it wasn't for the stain of the fuel, you can't tell the Seal-All is there, until you get up real close. It is clear and a little goes a long way. Plan to use some touch up paint once the weather warms up more.
Many, many years ago, used this stuff on a drive from Alaska to Alabama.
On one of the 200-mile gravel road sections in Canada, a huge rock dented and smashed a good size hole in the gas tank of my car. Applied the Seal-All with fuel leaking out. Cures fast, Never leaked again!
Best regards,
Mike Bauer