Is the aviation sealer that’s more available….a bit “thinner” in viscosity than the super 300? I was under the impression that is was, but not sure where I got that idea.
The poop-brown brush-on sealer Permatex sells is nowhere near as effective as the Super 300, which is almost black. I've heard rumors S-300 was developed during the early 1950's to be resistant to high octane aviation gasoline, which would eat most other sealers like candy. Not sure how true that is, but I've heard it from several sources I consider to be reliable.
Jerry
