Ken Ferschweiler wrote:

I use AquaSeal's "Seal Saver", which is claimed to be specifically
for drysuit gaskets. It seems to keep my gaskets in good shape,
but I haven't used any other products enough to have a baseline
to compare it to. Anyone have any opinion on it?

I've never used Aquaseal SealSaver, but OS Systems recommends it
for drysuit gaskets, whereas Kokatat recommends 303.