How to Fix a Rock Chip on Your Windshield

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It can be annoying to be driving behind a large vehicle that flips up debris and rocks. If a rock flips up and chips your windshield, the good news is that there are a lot of DIY options out there. Take a look at how to fix a rock chip on your windshield.

See if the Chip Can Be Repaired at Home

It's important to make sure that the chip is reparable. There should be a slight dip in the chip so that resin can flow into it. Grab a quarter and place it over the chip. If the chip is smaller than the quarter, you could repair it yourself. If it's quite large, it's better to take the glass to a shop for a replacement.

Also, keep in mind it's not a good idea to replace rock chips yourself if they are near the frame of the glass. If you roll over, the windshield can help support your car roof. If you get hit, the windshield also helps transfer energy throughout the car's framework. In other words, rock chips that are near the frame compromise the support of the windshield, thus increasing your risk of injury if you get in an accident.

Fix the Chip

Buy a rock chip kit from a hardware store. These often come with the glass resin, and injection syringe, and pins to remove air bubbles. Choose a clear day to repair your car. If it's too cold outside the repair resin may not cure soon enough; and if it's too hot outside, that could also mess with the repair resin's consistency.

Place painter's tape around the chip so that the resin doesn't seep everywhere. Clean out any debris and leftover glass inside the chip with a pin from the kit. Once the chip is clean, clean the glass with an alcohol wipe for a good bonding surface.

Your kit may come with an adhesive disk that is similar to painter's tape. If it does, place this disk around the chip so that resin doesn't get over the rest of the glass. Then syringe glass resin into the center of the disk and into the chip. Rock chip kits often come with a syringe because not only do they insert resin, they suck out any air bubbles in the chipped area.

Once the chip has been filled, place a card—like an old credit card—over the surface and "squeegee" over the card with a razor blade. This will smooth out any bubbles or leftover resin. Your kit may have additional tools to do this step so that the resin blends in with the rest of your glass.

If you need more help, contact an auto glass service in your area.

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8 November 2019

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