Hobie i12s loses air at the mirage drive shaft

Hello,
My i12s is losing air at the Mirage drive bay.
My local German dealer can't help me and asked me to find help on the international Hobie forums: so here I am.

My two main questions are:
-Which glue should I use?
The leak is between the rubber material and the hard plastic of the drive shaft.

- how should I proceed when gluing?
Should I try to loosen the whole edge or use a syringe to squeeze the glue into the "loose" areas.

Here how it looks like



Many thx

Uwe