Dr Crash is right - a contact adhesive would be the best stuff. Comes in the name of "Bostik" or "Evo-Stik" from most hardware store. Epoxy would be too brittle.
Called "contact" adhesive 'cos you slime it on both surfaces to be joined, let it set for 10 mins, bring the two parts together and "CONTACT".
You'll probably find that contact adhesive will become brittle over time (years), but that shouldn't worry you.
Another alternative would be silicon sealant, but would be a dog to remove and clean up should you ever want to do so.
It's an ill wind that never blows at all.