Before the seals stick to the wrong side of anything, I use GM's recommended treatment for rubber seals: silicone grease. It keeps the rubber 'live' longer, protects it from the elements, and keeps it from sticking where it shouldn't. Car door, window, trunk, hood, and any other seal of that kind.
I couldn't agree more, I use a 50 weight silicone oil for rubbing on seals. It's made for paint ball gun lubrication and lasts a long, long time. The thickness of the 50 weight lets me put it on my finger to spread it around without it dripping off. I use a water-thin silicone oil for easing assembly of tight fitting parts. FWIW my favorite quick drying flexible glue that works on rubber and plastic is Loctite vinyl, fabric & plastic flexible adhesive. It works well, is transparent and permanent, and yet and is easily removed when desired.