Here's a step-by-step guide:
1. Preparation is Key:
* Clean the Surfaces: This is the MOST crucial step. Thoroughly clean both the back of the mirror mount and the windshield where the mirror will attach. Use a strong glass cleaner and a lint-free cloth. Remove any existing adhesive residue completely. A razor blade (carefully!) or a plastic scraper might be needed for stubborn residue. Isopropyl alcohol (rubbing alcohol) can help dissolve remaining adhesive. Let the surfaces dry completely.
* Assess the Damage: Inspect the mirror mount and the windshield for cracks or significant damage. If either is compromised, replacing the mirror assembly is likely necessary. A cracked mount will likely fail again.
* Gather Materials: You'll need:
* Automotive-grade adhesive: Do not use regular household glue. You need a strong adhesive specifically designed for bonding to glass and plastic, and capable of withstanding vibrations. Look for an adhesive labeled for rearview mirror installation or windshield repair. Some examples include Permatex Mirror Adhesive or equivalent. Check auto parts stores.
* Lint-free cloths: Several are recommended for cleaning and application.
* Razor blade or plastic scraper (optional): For removing old adhesive.
* Masking tape (optional): To hold the mirror in place while the adhesive cures.
* Protective gloves (optional): To keep your hands clean.
2. Applying the Adhesive:
* Apply sparingly and evenly: Follow the adhesive manufacturer's instructions precisely. Too little adhesive will result in a weak bond; too much will squeeze out and make a mess. Apply a thin, even bead of adhesive to the back of the mirror mount where it contacts the windshield.
* Position the Mirror: Carefully align the mirror with its original position on the windshield. Press firmly and evenly onto the windshield, ensuring complete contact.
* Secure (Optional): Use masking tape to temporarily hold the mirror in place while the adhesive cures. Apply the tape gently to avoid shifting the mirror.
3. Curing:
* Allow sufficient curing time: Follow the adhesive manufacturer's instructions regarding curing time. This is typically several hours, or even overnight, for a strong bond. Avoid touching or moving the mirror during this time.
4. Final Check:
* Remove tape (if used): Once the adhesive is fully cured, carefully remove the masking tape.
* Inspect the bond: Gently check the mirror for stability. It should be firmly attached.
Important Considerations:
* Professional Installation: If you're uncomfortable with this process or are unsure about your ability to complete it successfully, it's best to take your vehicle to a professional auto glass repair shop. They have the right tools, experience, and adhesives for a guaranteed repair.
* Warranty: Improper repair may void any existing warranty on your windshield or rearview mirror.
This process is a guideline; always refer to the specific instructions provided with the adhesive you purchase. Be patient and meticulous for the best results.
