5 Tips to Stop Windshield Cracks From Spreading

Last Updated on February 2, 2024 by John Robinson

A cracked windshield can be a significant inconvenience and a safety hazard. It can quickly spread, whether caused by a small rock chip or a more significant impact and can compromise your safety on the road. However, taking immediate action and following proper precautions can help prevent the crack from spreading further. Here are five effective ways to deal with a windshield crack and stop it from spreading:

  1. Use a Windshield Repair Kit

A windshield repair kit is designed to provide a DIY solution for addressing minor windshield damage before it worsens or requires a full replacement. It includes a specialized resin or adhesive, an applicator or syringe for applying the resin, and other tools such as curing strips, razor blades, and cleaning materials. The resin is specifically formulated to bond with the glass and restore its structural integrity, preventing further cracking or spreading of the damage.

  1. Use Super Glue or Nail Polish

For temporary measures, until you can get professional assistance, you can use super glue or clear nail polish to stop the crack from spreading. Apply a small amount of glue or polish along the length of the crack. It will help seal the crack temporarily and prevent dirt and moisture from entering, which can worsen the damage. Remember, this is a temporary solution and should not replace professional repairs.

  1. Seek Professional Assistance

A trained technician from companies such as Van Isle Glass can assess the severity of the crack and recommend the appropriate course of action. They have the expertise and tools to determine if the crack can be repaired or if windshield replacement is necessary. Professional repairs are typically more durable and can restore the windshield’s structural integrity.

  1. Avoid Temperature Extremes

Extreme temperatures can cause the glass to expand or contract, stressing the crack and making it more likely to spread. To minimize this risk, avoid exposing your vehicle to sudden temperature changes, park your car in shaded areas or a garage to shield it from direct sunlight, and avoid using hot water or defrost functions on your windshield during cold weather. Gradual temperature changes are less likely to aggravate the crack.

  1. Minimize Vibrations

Vibrations can cause the crack to widen, so it’s essential to minimize any unnecessary jolts or shocks to your vehicle. Avoid rough roads whenever possible, as they transmit vibrations through the car’s frame and windshield. Choose smoother routes to reduce vibrations and jolts that can worsen the situation. When closing your vehicle’s doors, be gentle and avoid slamming them shut. The sudden impact can create vibrations that may propagate through the vehicle, increasing the chances of the crack spreading. 

The high-pressure water jets and brushes can also worsen a windshield crack. The forceful impact of the water or brushes on the damaged area can cause the crack to spread further. It is advisable to avoid car washes until the crack is repaired or the windshield is replaced.


Remember, a cracked windshield should never be ignored or taken lightly. Even small cracks can compromise the strength of the glass, endangering the driver and passengers. By taking prompt action and following these preventive measures, you can effectively deal with a windshield crack and prevent it from spreading further, ensuring your safety and peace of mind.

John Robinson
John Robinson

Howdy! I’m John Robinson from Levittown, New York. I am a mechanical engineer for 15 years and already had an established car repair company. I developed a personal relationship with cars since I was a kid. I always love the sounds and smell emitted by a car or truck and even at construction machinery. Since then I have been married but my love for cars only grew.