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How long does it take for epoxy resin to cure?

Different time for different epoxy resin, after mixed, curing time from a few minutes to 72 hours, very different, the shorter curing time, the shorter pot life.
Normally, clear epoxy resin for crafts, will need about 8 hours to cure, and will reach its highest hardness in about 3 days. with the pot life of about 45 minutes.
And for composite material, normaly curing time is about 2-4 hours while the pot life is about 15 minutes only. Do also have long curing time model like 24hours, and pot life can be about 2 hours, this is special model for some certain customers with higher cost.
For epoxy glue, curing time need fast, so pot life also short, curing time from 5 minutes to half hours, and pot life from 2 minutes to 5 minutes.