Have a few tubes of 2 hour epoxy. The tubes are about 3/4 filled and are also 4 years old.

Does epoxy expire? The hardner looks fine, but the epoxy resin tube has some soft solid masses inside.

Can this still be used (heated up to melt) or is it garbage?

Also, the temp in the basement is about 55 deg F. Too cold for a good cure?????

Thanks.