Replace slide out seals every five years?

Since tires have to be replaced every five years due to dry rot, I'm wondering if the same issue applies to slide-out seals. They are not weight bearing so a seal that rots isn't going to cause catastrophic failure, but they are made out of a similar rubber compound, I wonder if they have the same issues as tires when it comes to age.

Since the seals are the main line of defense against water intrusion, if they fail, the damage wouldn't be immediate, but would be severe over time.