I use Dupont Krytox on my weatherstrip/seals. GM part number 3634770 which I purchased from Mark (rssrtoy). Don't remember the price but not cheap, about $40 for a 1 oz bottle if I recall. Below is a link I found a while back discussing this issue with respect to Armor-All, 303 protectant, Silicone and Krytox. It is a good read. The cost for a set of seals for our SSR's is outrageous and some items NLA. Read and form your own opinion.
Weatherstrip Maintenance
I believe the direct Dupont number for this to be GPL-105 or there is a thicker version sold in a syringe-type applicator called GPL-205. There are two newer variants out called GPL-103 & GPL-104 that I believe Ford is now using. Volkswagen also sells under their p/n as well.
I'm too much of a chicken to try anything else due to parts costs and scarcity, so I just stuck with the GM product. Wish I knew about this with my old '81 Cutlass 2 door. Front window squeaks use to drive me batty. Used vaseline on those seals and guides to quieten them - worked fairly well at the time.
