Home › Forum › Ask A Member › Gas Tank Sealer › Re: Gas Tank Sealer
Recently, after a bunch of reading about this, I used POR-15 Fuel Tank Sealer. (They make other stuff also). I think this is a moisture-curing polyurethane product. My report is so-far-so-good. It seems to cure very hard and so far–but I have only a few weeks to go on–it seems to be resistant to typical 10% ethanol motor gas.
People are also using it for sealing cork floats.
One suggestion based on my experience: The stuff is loaded with metallic pigment. I presume aluminum. Shaking is not enough to mix this–it needs to be stirred with a bottom-scraping action. I didn’t realize this, not supposing that a tank liner product would be pigmented. When I got to the bottom of the can it was very thick and gloppy.
There are two-part products around that might have a higher performance.