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Windshield Repair How To

Auto glass repair tricks of the trade

Scott Tsuneishi
Aug 8, 2014

We've all been there or experienced it at one time or another: That all too familiar driving scenario that places you and your car on the local highway when all of the sudden, a semitruck kicks up a rock that comes hurling toward your windshield. That unpleasant thud followed by a chipped windshield is not only frustrating but also discouraging. We all know too well that a small chipped windshield could develop into a crack at any time—and often happens when you least expect it. That is when knowing proper windshield repair techniques become important.

DIY auto glass repair 3M windshield repair kit 01 Photo 2/14   |   DIY Auto Glass Repair 3M Windshield Repair Kit 01

Replacing a windshield or any auto glass repair can become a costly situation but there is a less expensive alternative. 3M offers a windshield repair kit that's designed to repair small bull's eyes and chips in auto glass. While the kit won't eliminate the damage completely, it can minimize the appearance of small bull's eyes, spiderweb cracks, and star damage that are less than 1 inch in diameter on windshields. This simple-to-use kit includes everything you need to repair small cracks and chips in the comforts of your own garage.

DIY auto glass repair stick pen 03 Photo 3/14   |   Windshield Repair How To

1. To begin the windshield repair process, remove any loose glass debris. 3M includes a stick pin with their kit but we used a larger-sized pick, which offers more control.

DIY auto glass repair foam cleaner 04 Photo 4/14   |   Windshield Repair How To

2. Clean the surface thoroughly using foam cleaner and towel/cloth while making sure not to embed any dirt or contaminants into the crack

DIY auto glass repair alcohol wipe 05 Photo 5/14   |   Windshield Repair How To

3. Use the provided alcohol wipe to clean the area surrounding the crack to promote proper adhesion for the suction cups.

DIY auto glass repair bridge 06 Photo 6/14   |   Windshield Repair How To

4. Assemble the bridge and place it onto the windshield while making sure to center the unit directly over the damaged area.

DIY auto glass repair bridge 07 Photo 7/14   |   Windshield Repair How To

5. Assemble the bridge and place it onto the windshield while making sure to center the unit directly over the damaged area.

DIY auto glass repair bridge placement 08 Photo 8/14   |   Windshield Repair How To

6. Double-check the placement of the bridge from the inside before proceeding to the next step. Notice we placed a paper towel under the piece to prevent excess resin from flowing onto the glass.

DIY auto glass repair glass resin 09 Photo 9/14   |   Windshield Repair How To

7. Use the supplied dropper to fill the chamber with 3M glass resin at half capacity.

DIY auto glass repair injector 10 Photo 10/14   |   Windshield Repair How To

8. Screw the injector into the chamber. This is an important step that forcibly injects the resin into the crack/chip.

DIY auto glass repair bridge 11 Photo 11/14   |   Windshield Repair How To

9. Dry the area under the sun completely for a minimum of 30 minutes before removing the bridge.

DIY auto glass repair excess resin cleaning 12 Photo 12/14   |   Windshield Repair How To
DIY auto glass repair excess resin cleaning 13 Photo 13/14   |   Windshield Repair How To

10. Any excess cured resin should be gently scraped off before wiping the area with cleaner.

DIY auto glass repair excess impact chips 14 Photo 14/14   |   Windshield Repair How To

11. We couldn't believe it ourselves but the nasty crack was nearly invisible thanks to the 3M repair kit. The only evidence of the crack was the impact chips marked by the red arrow.

Sources

3M Auto
877-666-2277
http://www.3mauto.com
By Scott Tsuneishi
247 Articles

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