Fish sauce already has a long production and fermentation time, and it will sit just fine unrefrigerated. It may continue to ferment a bit and change slightly in flavor, but it is still safe to eat.
How long will fish sauce last after opening?
An unopened fish sauce can be kept for two to three years. While the opened fish sauce will take three to six months at room temperature and a year if kept inside a refrigerator.
Is fish sauce supposed to smell bad?
Fish sauce has an earthy, savoury flavor field. It is salty and briny and there’s a distinct, pungent smell to the sauce as well. The boldness of the sauce pairs wonderfully with meat in marinades and glazes, giving the dish a complex flavor.
Can you use expired sauce?
While nonperishable foods are generally safe, make sure you never eat these foods past their expiration date! Condiments are shelf-stable foods and can be stored unopened in the pantry for long periods of time.