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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?