I had some six minute epoxy that was at least 10 years old. For all but three years of the time I owned this epoxy it was kept in an utility building. The heat and air was on only when I was in the shop. Until this past week it was still setting on a shelf in my shop.

Last week I blew the dust off the bottle and found the hardener half look OK, but the epoxy half was so thick it would not come out the nozzle. I took the cap off the epoxy half and the contents came out like tooth paste. I mixed it with the hardener like usual and it set up and seemed to work fine.

Now I would not suggest using epoxy in this condition for anything critical, but after ten years of being exposed to freezing and to temps well in excess of 100 it would still set up.