Bob Fidler wrote:
After 12 years the adhesive tape used to hold the seal in place has
deteriorated to the point that your original seal installation may be
unsafe. I've seen approx. 10 years seal installations where the adhesive is
about to release the seal. A small tug on the seal itself and the seal may
slip away from the adhesive. A lost seal inflight is something we all must
avoid at all cost. Control surfaces can stop working after a total or
partial separation.

Inspecting the seal fairing tape (leading edge of seal) before every
flight and replacing it once a year goes a long way towards keeping
seals safe. Agree though that the seal adhesive is life limited,
particularly in Arizona where it dries up.

I know of no way to restore the seal curvature but I did learn along
time ago not to tie the glider out with the elevator up as the seal
takes a set.

Andy