From personal experience in RC building, unopened CA will keep almost forever in the freezer. I have also had good luck with opened bottles as well. As an aside, I heartily recommend opened bottles be stored vertically AND in a plastic bag. It does take a while to clean up if it does spill. You have to let the CA come to room temp to use and, eventually, condensation will set up the CA in the bottle. Moisture is a catalyst to CA; in a pinch, if you want to speed setting a joint, just breathe on it.