How to Glue a Button to a Rear View Mirror
- 1). Use a safety razor to scrap off the residue from when the mirror fell. The thin sheet of old glue will come off easily.
- 2). Soften the back of the button by rubbing it against sandpaper. Use 100 or 150 grit sandpaper, because it can polish the back and not damage the button.
- 3). Apply two to three sprays of glass cleaner onto the windshield to begin cleaning the mirror. Three sprays will be enough to clean the whole mirror.
- 4). Wipe the mirror off with a dry wash cloth or paper towel. Let the mirror air dry, once you have dried the mirror. This will ensure that the mirror is completely dry. Applying glue to a wet mirror will cause the mirror to fall.
- 5). Apply two to three small drops of mirror adhesive glue onto the back of the button. Place the button in the middle of the windshield. The curved part of the button should face up.
- 6). Hold the button on the surface for 10 minutes or until it has completely stuck. Attach the entire mirror to complete the setup of the rear view mirror.
Source...