This thread seems an appropriate time to note that properly applied and cared for Mylar seals can last a LONG time. When UH helped me refinish my then-26-year-old ASW 24 wings last winter, it was REALLY difficult to remove the original seals. The toughest part was getting the adhesive out of the channel in the wings. There was no tendency to "just pull on the end of the seal and it will lift right off". I had replaced the safety tape once before and that was easier to remove (and the previous adhesive had, in fact, deteriorated into a chalky powder).

The seals seemed to have retained their curvature, too, with no apparent tendency to lift off the control surfaces when deflected. I'm speaking just of the ailerons. If you have flaps that deflect further, this might not apply.

I always install the control locks on the ailerons in the neutral position when the glider goes in the trailer so I think that helps.

Your situation may be different so check the seals carefully from time to time. A loose seal can cause serious problems. But don't assume you need to rip them off and replace them if they're working fine and still secure.

Chip Bearden