I used this stuff to seal the electronic cable inside the outlet hole of the metal ETA housing because I broke off the metal peice taking it off. This stuff has no conductivity, it dries rock hard and is so tough that using a clamp to keep the cable from pulling out, as I planned, was silly after using this stuff. Its just too strong to worry. Its supposed to be good to 250F. It leaves a nice looking smooth black glossy surface. I intend to keep this stuff in my tool box, always. There may be other brand names that are similar.
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