Where does tomato sauce belong

CYDdharta

Correct, until it's opened, then it belongs in the fridge.

xlJ_dolphin_473

I strongly believe that until opened, it may be kept in a cool dry place, but once opened it must remain refrigerated below 5°Celsius. My evidence for this is that on the packaging of the tomato sauce in my fridge, the storage instructions read:
STORAGE
Once opened keep refrigerated.
When the packaging is sealed, it's fine. The tomato sauce is not exposed to the effects of oxygen. But once opened, it's vulnerable to the elements. This is why you must keep it in the fridge once you've opened it.

RS_master

I believe that tomato sauce should be kept in the fridge but for no longer than 3 months. Once opened tomato sauce should be generally microbially stable due to its low PhH so unless stated otherwise on the pack tomato sauce should be kept in the fridge.