I have used Kreem several times to seal motorcycle gas tanks and I was pretty happy with the results. On one of the tanks though, the sealant did start to peel in a couple areas after about 3 months.

After that one tank peeled, one of my buddies suggested THIS

I've used it a couple times now and couldn't be happier with the results. It seems to adhere better and dry much harder.

Hope this helps.

Jeff

Some sound advice should you find yourself at the controls of an aircraft...

"Try to stay in the middle of the air. Do not go near the edges of it. The edges of the air can be recognized by the appearance of ground, buildings, sea, trees and interstellar space. It is much more difficult to fly there."