I tried tomato powder and it just solidified in the container. (I’ve been playing around with emergency storage since 2009, when the antichrist first took power.) So I know to stay away from dehydrated food and choose freeze-dried instead, and definitely avoid dehydrated tomato powder. Not only did I lose the powder, but I had to toss the jars also. It was like concrete.
I keep canned tomato products well beyond their “expiration dates”. As long as the storage is dark and dry. I’ve never had an issue...even with ten yoear old grocery store cans.