Epoxy won't kick at all if the temperature is under 55 degrees, but your bead kicked, so that rules out too cold, and too old. It has to be an outside issue like water, as mentioned, or oils entrenched into the board itself, and perhaps a bad mix. If the stuff is still good, let the crack dry, rough it up to remove any oils and then apply.

I used to cheat some of these with Suncure poly. Sand it, remove the splintered glass, fill with Elmer's (a buffer between polystyrene foam and polyester resin), let glue dry, then coat with Suncure.



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I was right.

Edited: 01/03/2023 at 03:10 PM by Cole