I'm currently "re-stuffing" all the caps in a radio, and was wondering what the substance is, that they used to seal the original cap. It's not a big deal, but I always thought they used beeswax --- and this ain't beeswax by any stretch. It still melts nicely in the oven at 250* F for 20 minutes just like beeswax, but then, it solidifies hard and brittle, like some form of plastic. I was intending to refill the new caps with the same goo that I got out of them. But that's clearly not an option. Can anyone tell me what this stuff is? I plan on sealing with "Goop"... A well-named, clear, paste-like stuff, that cures like a rubbery, semi-solid plastic. I would also like to know any other methods that you use, that might be better.