how.long is opened jar of prego good
exists and is an alternate of . Prego Sauce is good for 2 weeks in the refrigerator once opened. Or if you prefer, it can be frozen in a separate container for up to 6 months. Prego Sauce is good for 2 weeks in the refrigerator once opened. Or if you prefer, it can be frozen in a separate container for up to 6 months.