Liquid soft serve mix blend regularly has a time span of usability of no less than five weeks. When you are prepared to utilize it, it must be defrosted for 24-48 hours before you can put the blend in a soft serve machine. Once the liquid blend is defrosted it goes on for up to 14 days.
Cover it up: Once you've cracked open the tub, place a piece of parchment paper, cling film or similar over the ice cream surface. This will create a protective layer over the ice cream to protect it from air exposure. You could also put the whole tub in a sealable freezer bag too, for added protection.