For what it's worth, from Stew-Mac:
Stewart-MacDonald Super Glues have a relatively long shelf life at room temperature: a bottle will be usable for up to a year, although the glue will thicken as the months go by. Once it is too thick for its original use, you can use it on other projects requiring a thicker glue. For longer storage, keep unopened bottles in the freezer. Store partially-used bottles at room temperature: used bottles contain moist air from your workroom, which condenses and reduces shelf life. Always keep the bottles upright when not in use. Accelerator needs no special storage, but avoid high temperatures and keep the cap tightly sealed.