Float tube bladder question

[John Sv]

Hi,
I'm selling a float tube and want to make sure I'm setting up the buyer well. It is a Buck's Bag with their polyurethane bladder. Bladder was new 5 years ago, has never seen water, has been stored in the garage, and is airtight. With the above in mind, and your experiences, is the bladder good to go, or is it good form to replace bladders every X number of years regardless? Their bladders are spendy, like over-a-hundred-bucks spendy, so I'd like to let the buyer know..
Thanks
John

[SHigSpeed]

Urethane is pretty bulletproof. The worst for bladders in general are ozone and UV. Where I've seen them fail has been where the valve are cemented or welded in. If that looks sound it should be fine.

_SHig

[John Sv]

Thanks SHig