Originally Posted by cycle_maven

+1 on the Gorilla Glue. Polyurethane is about the only thing I've found that works well on a leather to synthetic bond (or synthetic leather to rubberized plastic). Sticks to anything and stays flexible. Just clean the dirt off of the mating surfaces. Don't get it on your fingers, though, 'cause it won't come off until the top layer of your skin wears away...