How To Fix Hairline Crack In Windshield?

Fix Hairline Crack In Windshield

A hairline crack in your windshield is no uncommon problem for any driver. They appear as a spider-like thin crack that spreads out from the point of impact. Fortunately, it is not the end of the world because you do not have to replace the whole windshield whenever it has a hairline crack.

Here are the necessary steps that car owners must take to ensure that hairline cracks are corrected. The first step is to inspect all windows of their car, diagnose the extent of damage done, understand why cracks happen in windshields, gather all materials, and clear up the windshield area. Afterward, they should apply the resin, allow curing, remove excess resin, and polish the area. For more extensive damage, seeking professional auto glass repair services is recommended to ensure the windshield is restored safely and effectively

9 Steps to Fix Hairline Crack in Windshield

Here is a step-by-step process of fixing hairline cracks on your car’s windshield.

Step 1: Inspect all Windows of your Vehicle

Inspect your vehicle’s windows, including the rear window and windshield, to ensure you haven’t missed any other cracks or damages. This general check will ensure all issues are highlighted and addressed to avoid further damage and ensure the fixing of hairline cracks in the car windshield.

Step 2: Assess the Damage

You must assess the size, location, and seriousness of your crack. Hairline cracks are usually less than 6 inches long and not structurally significant on the glass in the short term. However, if a crack near the edges obstructs your view, you should take it to a professional for an assessment.

If the crack is small and does not interfere with vision, you can attempt fixing it with a windshield repair kit.

Step 3: Understanding the Reasons of Cracks

Before discussing the best windshield hairline crack repair methods, you should know which type of crack you are dealing with. A hairline crack is usually caused by:

  • Rock chips or small stones: Small rocks or pebbles striking your windshield can create a tiny crack that expands.
  • Weathering: Cracks can also occur due to extreme temperature fluctuations, UV rays, etc.
  • Improper installation or repair: It causes cracks if the windshield was installed poorly or previously damaged improperly.

Step 4: Gather Your Materials

To repair a hairline crack in your windshield, you will need the following items:

  • Windshield repair kit (available at auto supply stores or online)
  • Razor blade or fine utility knife
  • Microfiber cloth or paper towels
  • Glass cleaner to fix hairline crack in windshield
  • Masking tape (optional to protect the area around the crack)

Windshield Repair Kit: What to Look For

Basic windshield repair kits comprise a resin solution, an applicator, curing strips, and a syringe or injector used to push the resin into the crack. You should apply these instructions to the windshield before reading them.

Step 5: Clean the Area

Cleaning the area surrounding the crack is essential before applying any repair material.

  • Use glass cleaner and a microfiber cloth to remove dust, dirt, or other debris from the windshield.
  • Ensure the crack is well-cleaned, as trapped particles can prevent the adhesive from bonding properly.
  • Wait for the windshield to dry after cleaning it to repair the hairline crack in the windshield.
  • You should try to apply this repair when it is not drizzling or humid. Moisture will interfere with the resin.

Step 6: Apply the Resin

Now, you can apply the resin to your damaged windshield.

Prepare the Kit

Open the package of your windshield repair kit and follow the instructions. Most kits will require you to attach an applicator directly over the crack.

Inject the Resin

Using the injector provided in the kit, inject the resin into the crack. Do not fill the crack too fast; distribute it slowly and evenly. Some deeper cracks may require pressing it slightly to ensure it can penetrate fully.

Remove Air Bubbles to Fix the Hairline Crack in the Windshield

Check to see if any air bubbles are trapped inside the crack from the resin application; if any, use the syringe to eliminate them. Most kits will have a vacuum to remove the bubbles from the resin.

Step 7: Cure the Resin

This refers to curing the resin after application and removing air bubbles trapped in the crack. During this process, the resin will harden and bond with the windshield’s glass.

  • Most repair kits contain UV curing strips. You cover the crack with those strips.
  • UV radiation coming from the sun catalyzes and hardens the resin.
  • Place the car under direct sunlight or use a UV light to remove hairline cracks from the windshield.
  • Depending on the resin used and prevailing weather conditions, it may take 30 minutes to several hours.

Step 8: Remove Excess Resin

After the resin has fully cured, remove the curing strip and inspect the crack. If excess resin has dripped onto the surface of the glass, take a razor blade or fine utility knife and scrape it away with care so that you do not scratch the glass.

Step 9: Polish the Area

Once the excess resin is removed, use glass cleaner and a microfiber cloth to wipe down the windshield gently. This should polish the area so no smudge or streak remains from the hairline crack on the windshield repair process.

Note: To avoid the hassle of the repair process, you can contact experts like Glass4Car for a smooth and flawless hairline crack repair.

Can Windshield Hairline Cracks be Fixed?

It is possible to fix the hairline cracks in windshield. However, the effectiveness of the repair depends on the crack’s size and location. Small, superficial cracks can be filled with resin, while larger cracks may require more extensive repair or replacement. It’s important to address the crack quickly, as leaving it untreated could cause it to spread. Additionally, cracks near the edges of the windshield may compromise its structural integrity, requiring immediate attention.

What are the Common Causes of Hairline Cracks in Windshields?

Common causes of hairline cracks in windshields include exposure to extreme temperature fluctuations, direct sunlight, and road debris impacts. Aging, manufacturing defects, and improper installation can also contribute to hairline cracks. In some cases, stress from body flexing during driving or sudden temperature changes can weaken the glass. It’s important to inspect and repair small cracks early to prevent further damage.

How do I Assess the Damage of a Hairline Crack?

To assess the damage of a hairline crack, inspect the crack’s length, depth, and location. Measure the crack’s length and note its starting and ending points and proximity to the windshield’s edge or other cracks. Additionally, check if the crack is spreading over time, as this could indicate worsening damage. If the crack obstructs your view or is near the edge, it’s recommended to seek professional evaluation.

Conclusion

Fixing a hairline crack in your windshield is simple if you have the right tools and follow the proper steps. Car owners should take the following measures: checking all the windows of their car, evaluating the condition, learning more about why there are cracks, gathering materials, and washing the windscreen area. They should then apply the resin, allow the resin to cure, trim off any excessive resin, and polish the area.

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