3M makes this hellacious glue that holds just about anything called Trim and Emblem Adhesive. It has xylene in it, which is really good in bonding agents because it can literally melt rubber onto metal, but not so much that it's like super glue. I used it to repair cracks and splits in my dash before painting it (yes, for whatever reason it's paintable too!) and I also used it to put the volvo emblems back on my tailgate, and as of yet no touchless car wash has taken them off! I don't know if this will exactly work for your application, but I do know that If youneed something to stay, that stuff will keep it there!

Hope this helps!
Andrew Gyger
Oldespeed Imports
The Hearse