Modified Molds

Is JB wield a good choice to alter a mold for pouting jigs. Wasn't sure what would happen when the hot lead hits the JB wield in the mold.
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I'VE USED IT AND DIDN'T HAVE ANY PROBLEMS.

I have used it also and I have not had any trouble at all. I have two molds that are nothing but JB weld and have poured a bunch with it and no trouble.

Thanks Guys
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