good question. i have actually researched this and i have found the answer for it recently. well it all depends on what kind of sauce you have or use. But normally up to a week. hope this helps.
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This food will keep for about 5 days in the refrigerator. Place the food in an air tight container for best results. It can later be transferred to the freezer for longer storage.
Unopened spaghetti sauce doesn't need to be refrigerated. Refer to the expiration date on the jar.