Once opened, Spaghetti sauce (in jars) keeps about 4 days in the fridge. Unopened, it keeps about 18 months.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 18 months |
| Opened · fridge | 4 days |
About 4 days refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.
Yes — keep Spaghetti sauce (in jars) at 40°F (4°C) or below once it's open. Cool, dry pantry unopened; refrigerate at 40°F (4°C) or below after opening.
Look for: Mould around the rim, cap, or surface; An off, fermented, or yeasty smell; Fizzing, bubbling, or a bulging lid; Separation or a colour change that won't stir back in. Never taste something to test it — when in doubt, throw it out.