I thought Shoe Goo was still on the market, and E6000 is a similar (improved?) product?
How much strength do you need on this bond? If it's a wide area and not subject to much force, any "instant" epoxy will do. Generally, slower the cure, stronger the bond. With fillers being helpful too, so, you have stuff like JB Weld actually being quite competent despite the casual availability. (Its higher temperature formulation smells a bit of phenolic, not sure what all exactly is in it.) Clean the surfaces well, and if it's shiny (solder mask?), consider roughing it up a bit with sandpaper first. (Obviously, don't go so deep you expose traces!)
Tim