For years, I've been putting Dielectric grease on rubber gaskets around doors, trunk, etc. It has to be applied in very warm weather and takes a bunch of elbow grease. Jaguar recommends Carbaflo KSP 105, it's costly, around $60. Anyone have any experience or other suggestions ?

 

Shin-Etsu Grease is great for weather stripping. Kind of expensive, but worth it.