How to repair the damage done by a rock on the windshield of a car (chipping)

A small stone lifted by a truck can damage the windshield chipping a portion of it. Over time this chip often becomes cracked to the point where the windscreen is broke and needs to be replaced. If you detect time can fix the damage before it gets worse. A repaired windshield looks almost like new.


  1. Make sure this is just a chip and a crack is almost impossible to fix with a repair kit. You can try but probably the end result has to replace the windshield anyway. Make repairs as soon as possible as a splinter can become a crack grows.
  2. Get windshield repair kit as mentioned below. You can order DIY repair kits or buy them at auto parts stores.
  3. Choose a dry day and park your car inside. It is convenient to make this repair when the weather is wet or cold. Clean the crack with a clean cloth dampened with acetone. Work carefully as acetone can remove paint from your car.
  4. Use the corner of a razor blade to scrape off any loose pieces of glass or dirt. Acetone removes dirt crack but can still be stones or small pieces of glass.
  5. Place the alignment tool repair directly above the crack. Most kits possess four suction cups with a threaded hole between them. Place it directly on the splintered party.
  6. Screw the repair tube firmly in the alignment tool. It is a small tube threaded with rubber tip. Get in the car and make sure that presses against the splintered party. If not you should unscrew and move the alignment tool to the right place.
  7. Put two drops of resin pipe repair (or as they say instructions) and quickly screwed the plunger as firmly as possible. Once properly adjusted, halfway for a few seconds to allow air bubbles to escape and then retighten. Let stand for about a minute and then remove the tools.
  8. Carefully apply finishing film on top of the repair. Let stand for at least 10 minutes and remove it.
  9. Use the razor blade to scrape the irregularities in the resin. The damage should be almost invisible.