How to Fix a Broken Rear Car Window: A Step-by-Step Guide

A broken rear car window can be a frustrating and inconvenient problem, but with the right tools and knowledge, you can fix it yourself. In this comprehensive guide, we’ll walk you through the process of repairing a cracked or chipped rear window, from assessing the damage to completing the repair. Whether you’re dealing with a small chip or a larger crack, we’ve got you covered.

Assessing the Damage

The first step in fixing your rear car window is to assess the extent of the damage. Take a close look at the crack or chip and determine its size, location, and depth. This information will help you decide whether you can perform the repair yourself or if it requires professional assistance.

Consider the following factors when assessing the damage:

• Size: Small cracks or chips less than an inch in diameter are typically easier to repair on your own. Larger cracks may require professional intervention.
• Location: If the crack or chip is within the driver’s line of sight, it’s crucial to address it promptly and correctly.
• Depth: Superficial cracks or chips that haven’t penetrated both layers of the window glass are more manageable for DIY repair.

Preparing the Work Area

Once you’ve assessed the damage, it’s time to prepare your work area. Choose a well-lit, dry, and shaded area to park your vehicle. This will make the repair process more manageable and improve the curing of the resin.

Clean the rear window thoroughly using a glass cleaner or rubbing alcohol to remove any dirt, dust, or debris. This will ensure that the repair resin adheres properly to the glass.

Gathering the Necessary Tools and Materials

To fix your rear car window, you’ll need the following tools and materials:

• A windshield repair kit, which can be found at most automotive stores or online
• A clean cloth for wiping the windshield and applying pressure
• A pair of gloves to protect your hands during the repair
• Clear tape to create a barrier around the damaged area
• A razor blade for removing excess resin
• A syringe or applicator for injecting the repair resin
• A curing strip or UV light for hardening the resin (if your kit includes UV-curing resin)

Repairing the Damage

Follow these steps to repair the crack or chip in your rear car window:

1. Use clear tape to create a barrier around the damaged area. This helps contain the resin and prevents it from spreading outside the target area.
2. Center the applicator or syringe over the crack or chip and apply steady pressure to inject the repair resin into the damaged area. Fill the crack or chip entirely with the resin, making sure there are no air bubbles left behind.
3. If your kit includes a curing strip, place it over the resin. Alternatively, you may need to use a UV light to cure the resin, as per the kit’s instructions.
4. Allow the resin to cure according to the manufacturer’s instructions. This step is crucial as it hardens the resin, making it strong and durable.
5. Use a razor blade to carefully scrape off any excess resin. Be gentle to avoid causing further damage to the glass. Wipe the area clean with a cloth.
6. Assess the quality of the repair. The crack or chip should be less visible, and the structural integrity of the window should be restored.

When to Seek Professional Assistance

If the damage is extensive, located in a critical area of visibility, or you’re not confident in your repair skills, it’s advisable to seek professional help. A trained technician can assess the damage and determine whether the window can be repaired or if it needs to be replaced.

In some cases, a rear window replacement may be necessary. This process involves:

1. Carefully removing the damaged glass
2. Vacuuming any debris and glass from the vehicle
3. Inserting a brand new rear windshield
4. Ensuring any defrost or technological capabilities are functional
5. Cleaning all of the glass on the vehicle

Safelite, Autoglass, and NuVision Auto Glass are some of the reputable companies that offer rear windshield replacement services.