It's catalyzed by moisture, so exposure to air will do it in. What
you really need, is a dessicator. With a paint can
and CaSO4 dessicator, I've kept an open tube of silicone
for months with no accidental curing.
I'm told Gorilla Glue (almost all the polyurethane glues) catallyzes
with any OH group (water, alcohol, etc), so it'd probably work on
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