3M windshield repair kit uses a clear glass resin to fill small bull's eyes, chips, spider web cracks and star damage, preventing damage from spreading over the windshield. By preventing windshield cracks, this kit can potentially save the cost of an entire windshield replacement. Filling chips with our auto glass repair kit also improves the appearance of your vehicle. 3M windshield repair kit makes filling chips in glass an easy job. Using our kit when a chip first occurs is a money saver over waiting until a chip spreads into a full crack. We recommend the 3M windshield repair kit for repairs on glass chips less than 1 in Dia. Chips in the driver's direct line of vision should be referred to a professional auto glass replacement shop. Complete step by step instructions make repairing glass chips an easy task. A rock kicked up from another vehicle can instantly chip your car windshield. If left unfixed, the chip can spread to a windshield crack. Fix small auto glass chips before a full crack develops. Small glass chips are repairable with the 3M windshield repair kit. Larger windshield cracks mean the entire windshield will need replacement. Save money and the hassle of windshield replacement by filling in windshield chips with this repair kit.