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How to Stop a Crack in Windshield from Spreading

stop a crack in windshield from spreading

Having a crack in your windshield can be a frustrating experience, especially when you know it has the potential to spread and cause further damage. However, there are a few steps you can take to help prevent the crack from spreading and save yourself from the expense of having to replace the entire windshield. A small crack might not seem important, but it can grow bigger and harm your car window if you don’t do anything about it.

Furthermore, timely intervention with professional auto glass repair services can effectively halt crack spreading and ensure the structural integrity of your windshield. Here, let’s explore some effective ways to stop a crack in the windshield from spreading and keep your vehicle safe on the road.

Understanding Windshield Cracks

When a small crack appears on your windshield, it might seem harmless initially. However, various factors can exacerbate the situation. Understanding the nature of these cracks and their potential to spread is crucial. The damage may also be impacted by the crack’s size, shape, and position. For instance, stop a crack in windshield from spreading that is closer to the edge of the windshield or in the driver’s line of vision can be more dangerous. 

Additionally, extreme temperatures and sudden changes in weather can cause the crack to expand. It’s important to address this as soon as possible to stop crack in windshield from spreading and jeopardizing the windshield’s structural integrity. A windshield fix or swap service can check the harm and suggest what’s best to do.

Factors Influencing Crack Spread

1. Impact

Origin of Cracks: A stop crack in windshield commonly stems from an impact. This impact could result from various sources, such as a stone kicked up from the road, a collision, or other forces striking the glass surface. The initial impact weakens the glass structure, creating a visible crack.

Propagation due to Stress: Subsequent impacts or stress placed on the glass, even if they are minor, have the potential to exacerbate the crack. The glass, already compromised by the initial impact, becomes more susceptible to further spreading with subsequent pressures or jolts. Applying a specialized resin can effectively stop windshield crack growing, ensuring safety while driving.

2. Temperature Fluctuations

Glass Stress from Temperature Swings: Utilizing a temporary fix for windshield crack can provide short-term relief, yet seeking professional repair remains essential for long-lasting reliability and safety. The glass in a windshield expands when exposed to heat and contracts in colder temperatures. Rapid and extreme changes between hot and cold temperatures can subject the glass to significant stress. This expansion and contraction weaken the structural integrity of the glass around the crack area, making it more prone to spreading.

Thermal Shock: Sudden changes in temperature can induce thermal shock, causing different parts of the glass to expand and contract at different rates. This stress can exacerbate the existing cracks or even create new ones. To effectively address and prevent further damage, it’s crucial to promptly fix windshield cracks with professional expertise and quality repair methods.

3. Moisture and Debris

Effect on Crack Condition: Dirt, moisture, and debris that accumulate within a temporary fix for windshield crack can worsen its condition. Moisture can seep into the tiny crevices, causing the crack to widen. Meanwhile, dirt and debris can obstruct the effectiveness of repair attempts and make it more challenging to fill the crack properly.


Abrasion and Friction: As the debris settles within the crack, it can create abrasive surfaces. Any movement or vibration of the vehicle can cause these particles to rub against the crack edges, further weakening the glass and facilitating the spread of the crack.

Immediate Steps for Prevention

Apart from the initial preventive measures mentioned earlier, here are some additional steps to curb crack expansion:

  • Avoiding Car Washes: Automated car washes that use high-pressure water may worsen the crack. Hand washing or gentle cleaning around the crack is preferable. In addition to avoiding high-pressure water, it is advised against cleaning the damaged region with abrasive or harsh chemicals. These can further damage the windshield and compromise its structural integrity. Moreover, considering the severity of the damage, opting for a reliable car windshield replacement service ensures optimal safety and visibility while driving.  
  • Keep a Distance: Maintain distance from large vehicles or construction zones where debris or stones might cause further damage to your windshield. This can reduce the risk of rocks or other debris from being kicked up by the vehicle in front of you and hitting your windshield. Additionally, be cautious when driving on gravel roads or in areas prone to high winds, as these conditions can also increase the likelihood of debris hitting your windshield. 

DIY Methods for Halting Spread

While professional help is often recommended, certain DIY approaches can help stopping a crack in windshield:

  • Clear Nail Polish or Super Glue: Applying a thin layer along the crack can prevent it from collecting debris. However, these methods are not permanent solutions.
  • Windshield Repair Kits: Follow the instructions provided in these kits to fill the crack with resin. While not a permanent fix, it can slow down the spreading and improve visibility.

Seeking Professional Assistance

  • Certified Technicians: To fix windshield cracks, professional services employ skilled technicians equipped with the right tools and materials to effectively fix cracks.
  • Insurance Coverage: Many insurance policies cover windshield repairs, often without raising premiums. Check your policy to determine coverage and potential out-of-pocket costs.

Detailed Examination of Crack Characteristics

  • Length and Location: The size and location of the crack play a significant role. Small cracks are easier to repair and less likely to spread rapidly. Cracks near the edges or in the driver’s line of sight require immediate attention.
  • Crack Patterns: Various crack patterns exist, including bullseye, star-shaped, and long cracks. Some patterns might spread more readily than others, necessitating prompt action.

Importance of Timely Repair

Acting promptly upon noticing a crack is crucial. Here’s why:

  • Preventing Expansion: Immediate action can stopping a crack in windshield from worsening, making repairs more manageable.
  • Enhanced Safety: A crack compromises the structural integrity of the windshield. Timely repairs ensure optimal safety while driving.

Learn More: How to fix Pitted Windshield

Conclusion: Prioritizing Safety and Maintenance

A windshield crack might initially seem inconsequential, however, putting it off can result in bigger problems. You can effectively stopping a crack in windshield from spreading by taking timely action, employing preventive measures, seeking professional help, and understanding the importance of maintenance.

Don’t forget that your safety on the road is very important. So, fixing windshield cracks quickly and using measures to prevent more damage will not only save you from costly fixes but also keep you safe when driving with your passengers. Regular maintenance and proactive measures of clean car windshield can go a long way in preserving the integrity of your windshield and ensuring a safe driving experience.


Do you have any concerns about auto glass replacement? Interested in a free quote? Feel free to give us a call today at 888-545-2770 or email us at

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Autoglass Master is a locally owned repair and replacement service offering fail-safe solutions for all types of autoglass issues. With affordability, holistic services, and a safety-oriented approach, we provide the utmost feasibility to our clients and ensure they are well served in all regards.

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