Open canned tomato paste stays fine for about 5 to 7 days in the fridge, provided you seal it tightly. Tomato paste tubs often last much longer, even up to 45 days after opening.
The 5 to 7 days period for canned tomato paste isn’t that long, especially considering that you usually use only a few teaspoons at a time.
The longer storage period that the tubs offer is a good option if your tomato paste leftovers often go bad, but it comes at a cost: the tubs are pretty expensive. So if you want to get more bang for your buck, it’s better to go with regular cans and freeze the leftovers.
Sure, it might look okay for like 10 to even 14 days, but sooner or later, it’ll start to grow mold. Tomato paste is acidic but not acidic enough to prevent mold growth.
Canned tomato paste has a shelf life of 1 to 3 years and easily lasts for months beyond the printed date. As long as the seal stays intact and the can is not dented, bulging, or starting to rust, the paste should be safe to eat.
Of course, if you store it for a really long time (like a few years past the printed date), it might not be that great quality-wise, but unless there’s something wrong with the container, the paste should be safe to eat.
Tomato paste usually comes in one of three types of containers: cans, glass jars, or tubes. But when it comes to storage guidelines, they are basically the same for each.
As long as the container is unopened, keep it in a cool and dry place, away from heat sources. And if it’s a glass jar, remember that it shouldn’t sit in sunlight.
The pantry or a kitchen cabinet is the natural place to store tomato paste. Just make sure the cupboard or shelf isn’t near the oven or a radiator.
Once you open the container, the tomato paste should be tightly covered and put into the fridge when not in use.
While sealing glass jars or tubes is not an issue, cans are more tricky.
You can seal those with cling wrap or a plastic bag and a rubber band. Or transfer the remaining paste into an airtight container or a glass jar.
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