A friend who does image transfers using Polaroid Type 669 asked me if this film can be kept after the expiration date if it is refrigerated/ or frozen. She wants to stock up before it is all gone, but doesn't want to lose it. I told her I would ask the people who know......
Even under refrigeration the developer-pods can dry out over time and not produce satisfactory results. Refrigerators over time remove moisture from all items left in them. There is no completely satisfactory way to keep Polaroid-type materials good over long periods of time.