How to Stop a Windshield Crack from Spreading


There’s no more unnerving feeling than having a rock or other object create a crack into your windshield, especially if your vehicle is relatively new. Although you’re probably happy danger is no longer possible, the main priority is to stop the crack from spreading. When the crack spreads far enough, you’ll most likely have to consider a complete windshield replacement. If you do catch it early enough and intervene, it’s possible the damage can be minimized. However, it’s still important to call an expert when the damage compromises your safety.

Cracked Windshields Are Dangerous for You and Others

Although it can be frustrating to get a chip or crack in your windshield, it should never be ignored. When you compromise your visibility, it is harder to see the road clearly, putting yourself and others in danger. Allowing the small crack to spread further across the windshield means a replacement is most likely necessary. Below are a few reasons why large windshield cracks must be replaced immediately.

  • Accidents are more likely- While you might only view the crack as an aesthetic element, that couldn’t be any further from the truth. It can impact the structure of your vehicle. At any given time, it could cave in and cause physical harm.
  • Distracts you and other motorists-Cracked windshields can make it hard for you to see the road. Their reflective nature can create glare and distort your vision, making spotting obstacles or other vehicles difficult. This puts you at risk and endangers other motorists on the road. Having a clear and unobstructed view while driving is crucial to ensure everyone’s safety.

How to Stop a Windshield Crack from Spreading

Below are some tips you can try if you have a windshield crack and want to keep it from spreading. Remember, these are temporary solutions, and an expert like Safe Auto Glass is always ready to provide further evaluation and professional repair if needed.

Avoid Extreme Temperature Changes

Extreme heat or cold can make the crack in your windshield spread further because it causes the glass to expand or contract rapidly. To prevent this, park your vehicle in a shaded area or garage during hot weather and avoid using air conditioning or defrosting functions on high settings during cold weather. Refrain from pouring hot water on your windshield in an attempt to thaw ice, as this sudden temperature change can cause the crack to worsen.

Use Clear Nail Polish or Super Glue

If you need a quick fix that works well, consider using super glue or nail polish over the crack. Remember, allowing the super glue or nail polish to dry completely is imperative so it does the job correctly. Afterward, you can use a small piece of clear packing tape over the crack to reinforce the repair and prevent further damage. This temporary solution should hold up well until you can professionally repair or replace the windshield.

Windshield Repair Kits

Windshield repair kits are easy to find, or you can even order them online. Like nail polish or super glue, they provide a solution when you need a quick fix. The substance in these repair kits is called resin, which is designed to fill in the crack and prevent it from spreading. To use a windshield repair kit, clean the area around the crack with a glass cleaner and towel. Then, follow the instructions on the kit carefully. You must apply the resin to a plastic applicator or syringe and inject it into the crack. Gently press down on the applicator to ensure that all air bubbles are removed from the resin.

Operate Your Car as Safely as Possible

If you know you have damage to your windshield, staying proactive is important until you get it fixed. Some best practices include utilizing a safe distance on highways and avoiding parking underneath trees or other objects that could potentially cause further damage to your windshield. It’s also crucial to avoid slamming your car doors or driving on rough roads, as this can worsen the crack and lead to more extensive damage. If you don’t feel comfortable driving even after temporarily fixing it, always contact a professional for help.

When Does the Windshield Need to be Replaced Instead?

Typically, the crack’s size, depth, and location are all important factors to consider when considering whether to replace or repair a windshield. While you might know how to stop a windshield crack from spreading, it’s almost always only a temporary fix. If your crack is longer than six inches or is located in the driver’s line of sight, replacing the windshield rather than attempting to repair it is recommended. Additionally, replacing the windshield is usually necessary if the crack has penetrated both layers of the glass or if there are multiple cracks present. Never risk your safety for something that an expert can fix rather quickly.

Call Safe Auto Glass If You Need Help

At Safe Auto Glass, we’re a group of experts who understand the importance of having a properly functioning windshield. It’s the main part of the vehicle you depend on for visibility. When it gets compromised, you should immediately ensure your safety on the road. We offer reliable and efficient windshield replacement services, catering to all types of vehicles. Our team of skilled technicians is well-equipped with the latest tools and techniques to handle any type of windshield replacement job. We use high-quality glass that meets industry standards, ensuring maximum durability and clarity. With our expertise, we can install your new windshield in no time.