Yesterday I dismantled an early 1940's (so I am told) GE fridge. Apparently cardboard was originally designed to be insulation, not for making boxes. Who knew? Anyway, I'm down to the bare metal, so to speak , and there is something that looks like beeswax that was used to seal the inside seams of the outer shell of the fridge. There was also a 3 inch wide piece of cloth that is impregnated with this stuff that sealed between the inner box and outer shell of the fridge. I tore off a strip and rolled it and lit it. It burns like a candle, melts and runs like wax and rehardens when away from heat. It is tacky to the touch. Anyone know if it is beeswax? If not, am I going to die heating and scraping it out?