I've had really good luck with Wurth brand brushable seam sealer. Goes on excellent and flows easy, remains flexible when dry and dries fast. If you're looking for an OE look, RestoRick has some product available.

https://www.wurthusa.com/Chemical-P...hable-Seam-Sealer-1-Quart-Can/p/08901021

3m's brushable is crap. Too stiff, cracks when it dries.