1. Preparation is Key:
* Clean the Surfaces: This is the most crucial step. Thoroughly clean both the windshield and the back of the mirror's mounting base. Use a strong degreaser like isopropyl alcohol (at least 90%) or a dedicated glass cleaner. Remove any dust, grime, old adhesive residue, or loose paint. Use a lint-free cloth or paper towel to avoid leaving behind residue. Let the surfaces dry completely.
* Assess the Damage: Examine the old adhesive. If there's a lot of old adhesive still stuck to the windshield, you might need to carefully scrape it away with a plastic scraper (metal can scratch the glass). Be very gentle to avoid scratching the windshield. If the mirror's mounting base is damaged, you'll likely need a replacement mirror.
* Gather Supplies: You'll need:
* Isopropyl alcohol (at least 90%) or glass cleaner
* Lint-free cloths or paper towels
* Plastic scraper (optional, for removing old adhesive)
* Automotive-grade adhesive designed for rearview mirrors. Do NOT use regular household glue. Look for something specifically designed for this purpose at an auto parts store. These adhesives often come with a curing time recommendation. Follow it closely.
* Masking tape (optional, to help hold the mirror in place during curing)
* Razor blade (optional, carefully use only if old adhesive is really stubborn)
2. Applying the Adhesive:
* Apply the Adhesive Sparingly: Follow the adhesive manufacturer's instructions carefully. Generally, you'll apply a thin, even bead of adhesive to the back of the mirror's mounting base.
* Position the Mirror: Carefully align the mirror on the windshield, ensuring it's perfectly centered and level. If using masking tape, carefully apply it to hold the mirror in place. Avoid excessive pressure.
3. Curing and Setting:
* Follow the Manufacturer's Instructions: The adhesive will need time to cure. This could be anywhere from a few hours to overnight. Avoid touching the mirror or moving the car during this time to prevent shifting. The manufacturer's instructions will give the proper curing time.
* Support the Mirror (Optional): If the adhesive instructions allow, you can use small pieces of tape, carefully placed, to provide some extra support while the adhesive cures. Make sure the tape doesn't get stuck to the mirror's face.
Important Considerations:
* Professional Help: If you're uncomfortable with this process, it's best to take your car to a professional auto glass repair shop. They have the proper tools and expertise to do the job correctly. A poorly glued mirror can be dangerous.
* Windshield Condition: If your windshield has cracks or other damage near where the mirror mounts, the adhesive might not hold properly. Consider a windshield replacement before attempting this repair.
* Type of Mirror: Some rearview mirrors are more complex than others (e.g., those with auto-dimming or compass features). If your mirror is particularly intricate, a professional might be the better option.
By carefully following these steps and using the correct adhesive, you should be able to successfully re-glue your rearview mirror. Remember that patience and precision are key to a successful repair.
