No, I am not a shill for MasterBond, but they do make a lot of neat materials that could be of use to some folks here.

Here's a low-exotherm epoxy you can use even for large castings. If you've ever tried to make one that was too big for the epoxy you're using, you know what a stinking, cracked mess you can wind up with:

https://www.masterbond.com/enews/low...e-casting.html

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Ed Huntress