All purpose automotive adhesive... widely available. Comes in a squeeze tube. Clear and runny. Smells like rubber cement. Apply to seal and hold the seal in place with your fingers for a minute or so. That's all it takes to start to set. After that, just leave it alone to do its thing. Holds very well. Used it on the outer rubber weatherstrip around the rear gate which the dealer neglected to do when they replace the original ripped seal... that's why I'd rather not leave repairs to the dealer. They just don't pay enough attention to the details. One thing to remember is to not to apply too much of the adhesive to the seal. It'll be a bit messy if you do.