1. Preparation is Key:
* Clean the surfaces: This is the MOST crucial step. Thoroughly clean both the windshield and the back of the mirror mount. Use a good quality glass cleaner and a lint-free cloth. Remove any dust, dirt, grease, or old adhesive residue. Isopropyl alcohol (rubbing alcohol) is excellent for removing old adhesive. Scrape away any loose material gently with a plastic scraper, being careful not to scratch the glass. Consider using a razor blade ONLY if absolutely necessary, and be EXTREMELY cautious.
* Dry thoroughly: Ensure both surfaces are completely dry before applying any adhesive. Even a tiny bit of moisture will compromise the bond.
* Assess the damage: Examine the mirror mount and the windshield. If the mount is cracked or damaged beyond repair, you'll need a new mirror. If the windshield has significant damage around the mounting area, professional repair or replacement might be necessary.
2. Choosing the Right Adhesive:
* Automotive-grade adhesive: Do NOT use household glues. You need a strong, durable adhesive specifically designed for automotive applications. Look for an adhesive labeled for use on glass and plastics. Examples include:
* Permatex Mirror Adhesive: A popular and reliable choice.
* Loctite windshield adhesive: A strong and durable option but might require more precision. (Consult product instructions).
* Other automotive-grade urethane adhesives: Check your local auto parts store for options.
3. Applying the Adhesive:
* Apply sparingly: Follow the adhesive manufacturer's instructions carefully. Generally, you'll apply a thin, even bead of adhesive to the back of the mirror mount where it contacts the windshield.
* Position carefully: Gently press the mirror mount onto the windshield, ensuring it's perfectly aligned. Use painter's tape to temporarily hold it in place while the adhesive cures.
* Clamp or support: Once in position, use masking tape and/or small clamps (carefully!) to hold the mirror firmly in place while the adhesive sets. Avoid putting too much pressure on the mirror.
4. Curing Time:
* Patience is crucial: Allow the adhesive to cure completely according to the manufacturer's instructions. This typically takes several hours, or even overnight. Do not use the mirror during this time.
5. Checking the bond (after curing):
* Gently try to move the mirror to check that it's securely bonded. If it moves, you might need to redo the process. If it still seems loose after fully curing, a stronger adhesive or professional help may be required.
Important Considerations:
* Professional help: If you're uncomfortable with this repair, or if the damage is extensive, it's best to take your car to a professional auto glass repair shop. They have the tools and expertise to ensure a proper repair.
* Safety: Always work in a well-ventilated area. Follow all safety instructions on the adhesive packaging.
* Warranty: If your vehicle is still under warranty, contact your dealer before attempting this repair yourself, as it could void the warranty.
By carefully following these steps and using the correct adhesive, you should be able to successfully re-glue your rearview mirror. Remember, thorough cleaning and using the right adhesive are the keys to a successful repair.
