I usually use BSI but I just went out to look and see what I have on hand in the shop at the moment, I have a bottle of Pacer 560 canopy glue still fresh and it's 8 years old, a little dab of Pacer hinge glue still flowing and it's 8 years old. The surprise was that I had half bottles of Z Poxy finishing resin and there epoxy that are several years old still good. About 1/2 inch of BSI epoxy still good. I have heat and air in my shop but almost never use it so the temps run from about 115 down to 20.
I did have to toss out what should have been good epoxy from Tower in just a couple months but from old posts here on RCU I knew Tower had a problem for some reason??
I have posted a lot about buying my CA from Wood workers supply stores just so I know it is fresh then storing it in the freezer until needed. I never have glues go bad, maybe just lucky?? Of course there isn't much moisture in the air here so humidity may be the big factor??