A small crack in your windshield might seem harmless at first, but it rarely stays that way. Cracks tend to grow slowly at first, then all at once. That little line can end up spanning your whole windscreen if left unchecked. Not only does it obstruct your view, but it can also weaken the structural integrity of your vehicle.
Understanding how to stop a windshield crack from spreading early can save you the trouble of a full replacement and help you stay safe behind the wheel.
Why Do Windscreen Cracks Spread?
A few common causes lead to cracks worsening over time:
- Temperature changes make the glass expand and contract. This movement can push a small crack further across the glass.
- Road vibrations add stress to the weakened area, especially when you drive over potholes, speed bumps, or rough terrain.
- Moisture and dirt can seep into the crack, weakening the bond between the glass layers.
- Pressure from heavy snow, falling debris, or even improper cleaning methods can add to the damage.
Understanding these triggers helps you avoid situations that could make the crack worse.
How to Stop a Windscreen Crack from Spreading
If you’re wondering how to stop a windshield crack from spreading, here are some practical tips you can apply immediately.
1. Avoid Sudden Temperature Changes
One of the easiest ways to stop a windscreen crack spreading is to keep the temperature of the glass stable. Don’t pour hot water on an icy windshield. Don’t crank the A/C when your windshield is baking in the sun. That sudden shift stresses the glass and can cause the crack to shoot across.
Instead, heat or cool your car gradually. Use the defroster on a low setting, or just crack open the windows to let the inside temperature balance out.
2. Park in the Shade
Sunlight heats up the glass quickly, which can make cracks worse. Park in a garage or under a tree when possible. A windshield sunshade can also help block direct heat and reduce stress on the glass. This simple habit goes a long way in learning how to prevent a windshield crack from spreading.
3. Drive Smoothly
Avoid rough roads if you can. Hitting bumps or driving at high speeds over uneven ground increases vibrations. That pressure spreads the crack even more. Until you get the crack repaired, stick to smoother routes and keep your driving gentle.
4. Cover It with Clear Tape
Learning how to temporarily fix a cracked windshield with tape is one of the simplest tricks. Place a strip of clear packing tape over the crack. It won’t hold forever, but it helps slow the spread while you arrange for a proper fix. Just make sure the tape doesn’t block your view.
What Can You Put on a Windshield Crack to Keep It From Spreading?
Aside from tape, there are a few other materials people try. Here are the most common options:
- Acrylic nail polish or super glue: These are very temporary measures. They may fill the crack slightly and reduce spreading until you get professional help.
- Windshield repair resin kits: Available in stores, these can be useful for small chips. However, they require proper application, and if not done right, you could make things worse.
Can You Fix a Small Crack Yourself?
You may be able to learn how to fix a small crack in a windshield using a DIY resin kit, especially if the crack is less than six inches long and not in your line of sight. These kits come with an applicator and instructions, but success depends on how clean the crack is and how quickly you treat it after damage occurs.
Still, the safest option is to see a professional. They’ll know whether a repair is enough or if a full replacement is needed.
Long-Term Prevention Tips
Here are a few habits that reduce the risk of cracks forming or spreading:
- Inspect regularly: Catch chips and cracks early.
- Replace wipers: Worn-out blades can scratch the glass.
- Clean the glass properly: Use soft cloths and non-abrasive cleaners.
- Maintain distance on highways: Rocks kicked up by trucks are a common cause of chips.
- Avoid construction zones: Loose gravel and debris are more common here.
- Park smart: Covered parking protects from hail, falling branches, and direct sun.
When Should You See a Professional?
Temporary fixes only go so far. If the crack has spread more than a few inches, reaches the edge of the glass, or obscures your line of sight, it’s time to seek a repair or replacement.
An expert can seal the crack properly using tools that aren’t available to the average person. They also make sure the repair doesn’t interfere with your vehicle’s safety systems, like airbags or sensors.
Don’t wait until the damage worsens. The longer you leave it, the more likely you’ll need to replace the whole windshield. For professional auto glass repair in Ajax, it’s best to act sooner rather than later.
FAQ: Common Questions About Windscreen Cracks
- Does clear nail polish fix a cracked windshield?
Not permanently. It might help reduce spreading for a day or two, but it’s not a reliable fix. Think of it as a temporary patch until you get professional help.
- Why is the crack in my windshield getting bigger?
Cracks spread due to changes in temperature, road vibrations, and pressure. Even parking under the sun or turning on the A/C too quickly can worsen the damage.
- How to seal a windshield crack?
A resin repair kit can be used for small cracks, but sealing works best when done by a technician. They can apply the resin evenly and use tools to cure it properly.
Final Thoughts
Cracks on your windshield are more than just a visual nuisance. They can spread easily and affect your safety if not addressed early. Understanding how to stop a windshield crack from spreading, and putting that knowledge into action, can help extend the life of your glass and keep you safe on the road.
Whether it’s avoiding sudden temperature changes or knowing how to temporarily fix a cracked windshield, even small actions can slow the damage. But don’t rely on quick fixes for long. The best solution is still a professional assessment.If you’re in the Ajax area and need help with a cracked windshield, get in touch with our team to book a quick assessment.
