John C Lucas
Yes. Ive been using it for 20 years to glue my mirrors to the wood. A other good adhesive for that is E6000. Both work great as glue. I dont have any long term tests to see if E6000 will react with the mirror silver but for your purpose it should work fine. I used E6000 to glue aome steel letters to a board that faces the morning sun and went through the full winter this last year. Still holding strong.