Reliable Auto Glass

Crack Control| Tips and Tricks for How to Stop Windshield Crack From Spreading

How to stop windshield crack from spreading is a crucial consideration due to the paramount importance of addressing a cracked windshield. A cracked windshield poses numerous dangers that extend beyond mere aesthetic concerns, making it imperative to take preventive measures and curb the potential risks associated with a compromised auto glass.

Why a Cracked Windshield is Dangerous

A cracked windshield poses various dangers, primarily stemming from impaired visibility and compromised structural integrity.

Impaired Visibility:

Distorted View: Cracks in the windshield can distort the driver’s view of the road, hindering the ability to accurately judge distances, objects, and potential hazards.

Glare and Reflections: The presence of cracks can cause light to scatter and create glare, especially during sunrise or sunset, making it challenging for the driver to see clearly.

Structural Integrity Compromise:

Increased Risk During Accidents: A cracked windshield is structurally weakened, and during a collision, it may not provide the necessary support to the vehicle’s roof. This increases the risk of injuries as the windshield contributes to the overall structural integrity of the car.

Potential for Shattering: The structural compromise makes the windshield more susceptible to shattering upon impact, further elevating the risk of injuries to the occupants.

Legal Implications:

Violation of Road Safety Regulations: Driving with a cracked windshield often violates road safety regulations in many jurisdictions. These regulations exist to ensure that vehicles on the road maintain a certain level of safety and visibility standards.

Fines and Penalties: In addition to being a safety hazard, driving with a cracked windshield can result in fines and penalties. Law enforcement may issue citations for vehicles not meeting safety standards, emphasizing the importance of maintaining a clear and structurally sound windshield.

Understanding How to Stop Windshield Crack from Spreading

Crack Control| Tips and Tricks for How to Stop Windshield Crack From Spreading

Causes of Windshield Cracks

Impact-Related Cracks:

Windshield cracks often result from impacts, such as rocks or debris hitting the glass while driving. Rapid changes in velocity or force can lead to visible cracks.

Temperature-Induced Cracks:

Extreme temperature variations, especially exposure to direct sunlight or sudden temperature changes, can cause stress on the windshield, leading to cracks.

Factors Influencing Crack Propagation

Environmental Conditions:

Weather conditions play a significant role in crack propagation. Factors like extreme temperatures, humidity, and exposure to sunlight can accelerate the spreading of cracks.

Type and Location of the Crack:

The type and location of the crack also impact its propagation. Cracks that extend towards the edges of the windshield are more prone to spreading. Additionally, the size and shape of the crack can influence its stability.

Importance of Timely Action

Preventing Further Damage:

Taking prompt action upon noticing a windshield crack is crucial in preventing further damage. Small cracks are more manageable and easier to repair, reducing the risk of the crack spreading across the entire windshield.

Cost-Effective Solutions:

Addressing windshield cracks early can be a cost-effective solution. Quick repairs are generally less expensive than replacing the entire windshield. Ignoring the issue may lead to the crack spreading, necessitating a more costly replacement.

Tips to Stop Windshield Crack from Spreading:

Use Clear Nail Polish or Super Glue:

Applying clear nail polish or super glue along the length of the crack can help prevent it from spreading. This creates a temporary barrier and stabilizes the damaged area.

Avoid Sudden Temperature Changes:

Park your vehicle in shaded areas to reduce exposure to direct sunlight. Avoid abrupt temperature changes, such as using hot water on a cold windshield or blasting cold air on a hot windshield.

Professional Repair:

Consult a professional windshield repair service. They can assess the damage and employ techniques like resin injection to fill the crack, reinforcing the structural integrity of the glass.

Use Windshield Repair Kits:

DIY windshield repair kits, available at auto supply stores, can provide a temporary fix. Follow the instructions carefully to apply resin to the crack, preventing further spreading.

Five Ways to Stop Windshield Crack from Spreading

Immediate actions after crack occurrence

Avoiding temperature extremes:

Rapid temperature changes can worsen windshield cracks. Avoid exposing your vehicle to extreme heat or cold. For example, don’t use hot water to defrost your windshield in cold weather, as the sudden change in temperature can exacerbate the crack.

Parking in shaded areas:

Park your vehicle in shaded areas whenever possible. Direct sunlight and exposure to high temperatures can cause the crack to spread. Shaded parking helps minimize the impact of temperature variations on the windshield.

DIY temporary fixes

Clear nail polish application:

Clean the crack and apply clear nail polish as a temporary sealant. This won’t completely fix the crack, but it can prevent dirt and moisture from entering and causing further damage. Note that this is a temporary solution and should be used as a stopgap until professional repairs can be performed.

Windshield repair kits:

Purchase a windshield repair kit, which typically includes resin and tools for DIY repairs. Follow the instructions carefully to fill the crack with resin, reducing its visibility and preventing further spreading. While this won’t make the crack disappear entirely, it can help stabilize the glass.

Professional repair options

Resin injection method:

Seek professional help for a resin injection repair. Technicians use specialized tools to inject resin into the crack, bonding the glass and preventing further spreading. This method is effective for repairing small to moderate cracks and can improve the overall structural integrity of the windshield.

Windshield replacement considerations:

If the crack is extensive or severely impairs visibility, consider windshield replacement. Professional technicians can replace the entire windshield, ensuring optimal clarity and safety. Replacement may be necessary for large cracks or those that compromise the structural integrity of the glass. If you want professional guidance the Reliable Auto Glass is best in business.

Regular maintenance tips

Periodic windshield inspection:

Regularly inspect your windshield for any chips or cracks. Catching issues early allows for timely intervention and prevents small problems from developing into larger, more expensive ones.

Addressing minor issues promptly:

If you notice a small chip or crack, take immediate action to address it. Use a DIY repair kit or consult with a professional to prevent the issue from escalating. Prompt attention to minor damage can save you money and ensure the long-term durability of your windshield.


Preventing a windshield crack from spreading is crucial to ensure the safety and longevity of your vehicle’s windshield. Immediate action is essential upon noticing a crack, as neglecting it can lead to further damage and compromise the structural integrity of the glass. To stop the crack from spreading, you can employ various methods. One effective approach is to apply a clear nail polish or epoxy resin on the affected area, creating a temporary barrier that helps to contain the crack. Feel free to contact us for any type of services or query like how to stop windshield crack from spreading.


Q: What Should I Do Immediately After Discovering A Crack In My Windshield?

A: Act promptly by cleaning the crack with a mild detergent and water solution. Dry the area thoroughly before attempting any repair.

Q: Can I Use Ordinary Household Glue To Fix A Windshield Crack?

A: No, it is not recommended. Opt for a windshield repair kit specifically designed for this purpose. These kits usually contain resin that is formulated to withstand various weather conditions.

Q: Will A Diy Repair Prevent The Windshield Crack From Spreading Further?

A: In many cases, yes. A timely and proper repair using a windshield repair kit can help prevent the crack from spreading and potentially save you from the need for a costly windshield replacement.

Q: How Long Does It Take To Repair A Windshield Crack Using A Diy Kit?

A: The time varies depending on the kit and the size of the crack. Generally, it takes around 30 minutes to an hour for the resin to cure and effectively seal the crack.

Q: Can I Use A Windshield Repair Kit On A Large Crack?

A: Most repair kits are designed for smaller cracks, usually those less than six inches. Larger cracks may require professional assessment and repair or, in some cases, windshield replacement.

Q: Will Repairing A Windshield Crack Affect The Visibility Through The Glass?

A: When done correctly, a windshield repair should not significantly impact visibility. In fact, it often improves clarity by filling in the crack and reducing distortion.

Our Services

Our Latest Blogs

Get A Quote

    Vehicle Make

    Glass to be replaced or tint

    Scroll to Top