The wing leaks that are being talked about here are from integral tanks and therefore the only 'seal' that is there is PRC, a sealing compound that stops fuel leaking from inside the tank through the weak points i.e. bolts, rivets etc (not rubber seals in the meaning of ring seals etc on fuel pipes).
I am unaware of any seals being re-lifed but that would be down to the DA/IPT/manufacturer to do a test on whatever seals were in stock and batch test a cross section to gain information as to whether they were acceptable for use or not.
Not something NLS gets involved with I'm afraid so therefore I cant comment on this.