Resealing a Windshield: Why It Matters And How To Do It Right

Windshield integrity is crucial for the safety and functionality of your vehicle. Over time, factors like weather, road conditions, or poor installation can lead to leaks or a loose seal. If you notice moisture inside your car, a whistling sound when driving, or water seeping through the edges, it may be time to consider resealing your windshield. 

This blog will guide you with the process of resealing a windshield, why it’s important, the signs your windshield needs resealing, and whether you should DIY or get professional help.

Why Is Resealing a Windshield Important?

The windshield of your car plays a vital role in protecting you from external elements like rain, dust, and debris, while also ensuring the structural stability of your vehicle during accidents. A properly sealed windshield ensures that:

• Prevents water leaks: Water entering your vehicle through an improperly sealed windshield can damage electronics, interior fabrics, and cause rust.
  
  
• Enhances safety: The windshield supports the roof, especially during a rollover accident, and a poor seal compromises this stability.
  
  
• Maintains a quiet cabin: Wind noise from an unsealed windshield can be bothersome and reduce driving comfort.
  
  
• Improves insulation: A well-sealed windshield maintains the right temperature inside your car by preventing air drafts.
  
  

Signs Your Windshield Needs Resealing

Before diving into how to reseal a windshield, it’s important to know when resealing is necessary. Here are common signs that indicate your windshield might need attention:

• Water leaks: If you notice water dripping inside your car during or after a rainstorm, it’s a clear indication that your windshield isn’t sealed properly.
  
  
• Wind noise: Excessive wind noise, especially when driving at high speeds, can indicate a compromised seal.
  
  
• Loose or wobbly windshield: A windshield that shifts slightly when pushed might have lost its original sealing.
  
  
• Visible gaps or separation: Look around the edges of your windshield for visible gaps between the glass and the vehicle’s frame.
  
  

The Resealing Process: Step-by-Step

Resealing a windshield isn’t just about applying some glue and hoping for the best. It requires the right materials and techniques to ensure a long-lasting seal. Here’s a step-by-step overview of the process:

1. Assess the Damage

First, check the condition of the windshield. If there are significant cracks or chips, resealing won’t be sufficient, and a full replacement may be necessary. For minor leaks or gaps, resealing is a viable option.

2. Prepare the Area

Before resealing, thoroughly clean the windshield and the areas around the leak. Dirt, debris, or old adhesive can prevent the new sealant from adhering correctly. Use a gentle cleaner and a microfiber cloth to wipe down the edges of the windshield.

3. Remove the Old Sealant

Use a plastic scraper or a specialized removal tool to carefully strip away the old, worn-out sealant. Ensure all remnants are removed, as leftover adhesive can weaken the new seal.

4. Apply New Urethane Sealant

Urethane is the industry-standard adhesive for windshield sealing. Using a caulking gun, apply a thin, even layer of urethane sealant around the perimeter of the windshield. Be careful not to apply too much sealant, as it can overflow and cause a mess.

5. Reposition the Windshield (If Necessary)

In some cases, you may need to slightly adjust the windshield’s position to ensure a proper fit. Gently press the windshield down so that it rests evenly in place and seals with the new urethane.

6. Let the Sealant Cure

Allow the urethane sealant to dry and cure for the recommended amount of time, which is usually around 24 hours. During this period, avoid driving or washing the vehicle, as movement or water can affect the seal’s strength.

7. Test for Leaks

Once the sealant has cured, conduct a water test by spraying your car with a hose to ensure the windshield is leak-free. If no water enters the vehicle, the resealing process has been successful.

DIY vs. Professional Resealing: Which is Better?

While DIY windshield resealing can save you money, it’s not always the best option. Let’s weigh the pros and cons of DIY resealing versus hiring a professional:

DIY Resealing

• Pros:

  • Cost-effective.
  • Can be done on your own schedule.
  • Satisfies the DIY enthusiast.
    
    

• Cons:

  • Risk of improper sealing.
  • You may not have the proper tools or sealants.
  • Errors could lead to bigger problems, like windshield replacement.
    
    

Professional Resealing

• Pros:

  • Expertise ensures a reliable and durable seal.
  • Professionals have access to high-quality materials.
  • Peace of mind knowing the job is done correctly.
    
    

• Cons:

  • Higher upfront cost.
  • Might require scheduling an appointment and waiting.
    
    

The Cost of Resealing a Windshield

The cost of resealing a windshield can vary depending on your vehicle’s make and model and the extent of the damage. On average, professional windshield resealing costs between $100 and $200. If you choose to reseal the windshield yourself, a tube of urethane sealant costs around $10 to $20, but you may need additional tools like a caulking gun and sealant remover.

Preventive Maintenance Tips to Avoid Windshield Leaks

To avoid the need for resealing in the future, consider the following preventive tips:

1. Inspect your windshield regularly for chips, cracks, and gaps.
2. Replace worn-out wipers to prevent scratches and wear on the glass.
3. Park in shaded or covered areas to protect your windshield from extreme weather.
4. Get chips or cracks repaired immediately to avoid bigger issues.

Conclusion

Resealing a windshield is a crucial maintenance task that can save you from costly repairs in the future. Whether you choose to DIY or hire a professional, ensuring your windshield is properly sealed will help prevent leaks, improve your car’s safety, and ensure a quieter ride. If you’re unsure about doing it yourself, seeking professional help from a reputable auto glass repair shop like GlassFixit is the safest route to ensure a perfect seal.

At GlassFixit, we specialize in windshield repair and replacement services. Contact us today to schedule an inspection and keep your windshield in top shape!

FAQs

1. How long does windshield sealant take to dry?
   Urethane windshield sealant typically takes 24 hours to fully cure. During this time, avoid washing or driving the car to ensure the best seal.
2. Can I drive my car immediately after resealing the windshield?
   It’s recommended to wait at least 24 hours after resealing your windshield before driving to allow the sealant to fully set.

3. What causes a windshield to lose its seal?
A windshield may lose its seal due to improper installation, extreme weather conditions, or prolonged exposure to sunlight, which can cause the adhesive to break down.