46+ Glue Wood To Mirror. When applying glue to the wood that will potentially be seen in the mirror take care to apply the glue on the side away from the reflective edge so as i'd recommend placing the glue onto the mouding in a zig zag pattern and let it sit for about 8 minutes or so before applying it to the mirror to let it get sticky. Most caulks bond well enough to wood and to glass to hold trim.
Hammered a few small nails along the bottom side just in case.
Last step is glueing the mirror to the back side of the wood. Use a scrap piece of wood to thin and spread out the glue. 1 x adhesive glue for glass & rear view mirror 8g high quality product kit include a rubber patch needed when sticking a rear view mirror to a windscreen this is an extremely strong glue and is most definitely suited to mounting rear view mirrors. I do have hot glue gun but wonder if glue would cool by the time i put several dabs on.