In article ,
Grumman-581 wrote:

I've had the gel seals leak... Basically they get hot in the aircraft
and turn to liquid... I tend to prefer the foam ones these days...

What brand? I have six pairs of DC's with gel seals. Two sets have had
gel seals since they were first introduced (20 years ago?).
To get the comfort from gel seals, purchase the cloth covers and wash
them periodically. The old DC cloth covers would come off if you weren't
careful. The new design stays put.