NO this is exactly what you dont want. Thin will use capillary action and go right into the hinge freezing everything that moves there. You want THICK. I would recommend DEVCON home plastic welder. Its a 2 part epoxy. Mix it..use sparingly, stick the mirror. wait an hour, trim with hobby knife, any excess..and wait for 24 hour cure. Im using the stuff right now and its golden. I just used it to repair a GIJOE defiant nylon/plastic gear drive. You use that thin on that, and your mirror will never move again. If you dont care if it moves..fine..but THICK is what you want in that application.