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I have had exotherm problems with the standard Jeffco hardener in quite
small batches at about 78 degrees farenheit.  After reading Pat Weston's
suggestion to use Jeffco 3176 instead of the standard hardener, I checked
with the company to see if the offered it.  They replied that they did not
carry it and had not officially approved its use because it did not pass
one or more of their (I'm sure stringent) tests.  Does anyone have any
other information about the use of this hardener or any alternatives that
have a longer pot life than the standard hardener?