Omar Khalid
A cracked or chipped windshield is a common issue for car owners, often caused by flying debris or stones on the road. While it may seem like a minor issue, small cracks and chips can quickly turn into large cracks that spread across the entire windshield, requiring a full replacement. To avoid this, it is recommended to repair the damage as soon as possible, either by seeking professional help or using a DIY repair kit. This paragraph will discuss the steps involved in patching a plastic windshield using a repair kit, which can be purchased from local auto parts stores and includes all the necessary tools and supplies, such as epoxy resin, a patch, and a plastic pedestal.
How to patch a plastic windshield
| Characteristics | Values |
|---|---|
| When to patch | When the crack is smaller than 3 inches and the chip is smaller than a quarter |
| What to use | Epoxy resin, adhesive patch, plastic pedestal, syringe, razor blade, plastic curing tab, bridge, injector, pit filler, mirror |
| Steps | Clean the area, scribe out loose glass, hook up the mirror, center the patch, apply adhesive, fill the pedestal with resin, inject the resin into the chip, let it sit, fill in the pit, cure the resin, smoothen the glass |
| Professional services | Glass Doctor, Safelite, Glass Solutions |
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What You'll Learn
Identify the extent of the damage
Before attempting to repair a plastic windshield, it is important to identify the extent of the damage. This is crucial because the type and size of the damage will determine the appropriate repair method, whether it can be repaired at all, and whether you can repair it yourself or if it requires a professional.
The first step is to assess the size of the damage. If it is a chip, measure it to see if it is smaller than a quarter. If it is a crack, measure its length to ensure it is no longer than 3 inches. If the damage is larger than these measurements, it may not be repairable, and the entire windshield may need to be replaced by a professional.
If the damage is a chip, it is important to inspect it closely to determine if it has spread into a larger crack. This can happen due to various factors, such as wind, rain, and the impact of driving, especially if you hit a pothole. Therefore, it is crucial to address chips promptly to prevent them from turning into widespread cracks that compromise your safety and require a costly replacement.
Additionally, when assessing the damage, consider its location on the windshield. Damage that obstructs the driver's view can be unsafe and may result in your car failing its inspection, depending on state laws and the severity of the issue. Thus, it is essential to be aware of the relevant regulations and guidelines regarding windshield damage and its impact on roadworthiness.
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Purchase a repair kit
If you want to repair a chip in your plastic windshield, you can purchase a repair kit from your local auto parts store or online. Before you buy a kit, it's important to identify the extent of the damage. Chips larger than a quarter and cracks longer than three inches may need a professional product or a complete windshield replacement.
A basic repair kit will include an adhesive patch, a plastic pedestal, and epoxy resin. More comprehensive kits may also include a mirror, a bridge or injector tool, a pit filler, a plastic curing tab, and razor blades. You can also use a dremel tool with a special glass bit for cracks.
When purchasing a repair kit, be sure to check the expiration date of the epoxy resin, as it does have a shelf life. Also, make sure the kit is suitable for the size of the crack or chip you are trying to repair. The adhesive patch should be larger than the chip you are trying to cover.
Some repair kits may require you to mix the resin yourself, while others come pre-mixed or mix as you apply it. Follow the instructions provided with your chosen repair kit for specific directions on how to mix and apply the resin.
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Clean the area
Before you start repairing your plastic windshield, it's important to clean the area thoroughly. Here are some detailed steps to guide you through the process:
Firstly, use an alcohol pad to gently clean the surface of the windshield, removing any dirt, dust, or debris. You can find alcohol pads in most first aid kits or at your local pharmacy. Make sure to wipe down the entire area surrounding the chip or crack, ensuring it is completely free of any contaminants. This step is crucial as it helps prepare the surface for the repair and ensures a strong bond between the adhesive and the windshield.
Next, focus on the “impact point” or the specific area where the chip or crack occurred. Use a scribe or a similar tool to gently remove any loose glass fragments. Be careful not to apply too much pressure, as you don't want to deepen the chip or expand the crack. Take your time with this step, ensuring that all loose pieces are carefully removed and disposed of properly.
Once the glass fragments have been removed, use a microfiber cloth or a soft, clean towel to give the area a final wipe. Make sure the cloth is free of any lint or loose fibres that could stick to the adhesive later in the repair process. Gently wipe the area in a circular motion, ensuring that the surface is completely dry and free of any remaining glass particles.
After cleaning, it's important to prepare the area for the repair. Place a mirror on the inside of the windshield, centred directly over the chip or crack. This will allow you to monitor the repair process from multiple angles, ensuring accuracy and precision. You may also want to cover the surrounding area with a protective sheet or newspaper to catch any resin drips and protect the rest of your windshield during the repair.
By following these steps, you can effectively clean and prepare the damaged area on your plastic windshield, setting yourself up for a successful and long-lasting repair. Remember, repairing a chipped or cracked windshield is a delicate process, and it's important to take your time and work carefully to achieve the best results.
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Apply the adhesive patch
To apply the adhesive patch, first, peel off the paper backing from one side of the adhesive patch. The chip should not be larger than the circular cutout in the centre of the patch. Centre the patch over the chip and stick it to the clean, dry outer-facing side of the windshield glass.
Next, peel off the other side of the paper backing and apply the pedestal—the moulded piece of plastic with a tube angling upward—to the adhesive. Line up the tabs for easy removal.
Now, fill the pedestal with liquid resin. Compress the syringe all the way down and insert it into the pedestal. Hold the pedestal with one hand and slowly pull up on the syringe plunger. Keep pulling up on the syringe plunger until you reach the end of its functional length.
Finally, watch for signs of air bubbles escaping and wait for the recommended time, which can be anywhere from 1 to 10 minutes. Don't remove the syringe until you no longer see air bubbles forming and being drawn out of the resin.
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Inject the resin
Injecting the resin is a crucial step in patching a plastic windshield. It requires careful attention to ensure a smooth and effective repair. Here's a detailed guide on how to inject the resin:
Prepare the Resin
Before injecting the resin, it's essential to check if it needs to be mixed. Some resins come pre-mixed, while others require mixing before application. Refer to the instructions provided with your repair kit to determine if mixing is necessary. If mixing is required, follow the specified instructions for the correct proportions and mixing technique.
Fill the Pedestal with Resin
The pedestal, which is a molded plastic piece with an angled tube, is an integral part of the repair process. Fill the pedestal with the liquid resin up to the top. Ensure the resin doesn't overflow, as you need a sufficient amount to completely fill the chip or crack.
Compress the Syringe
Take the syringe provided in the kit and compress it fully down into the pedestal. This step ensures that the syringe creates a vacuum and securely holds the resin within the pedestal. It's important not to let the syringe pull out completely, as this will disrupt the vacuum creation.
With one hand, firmly hold the pedestal in place while slowly pulling up on the syringe plunger with the other hand. Keep pulling the plunger until you reach the end of its functional length. This action will create pressure, forcing the resin into the chip or crack in your windshield.
Release Air and Re-inject if Needed
As you inject the resin, pay close attention to the release of air bubbles. It's crucial to ensure that all air bubbles escape before finalizing the repair. Depending on the size and number of bubbles, this step may take some time. If necessary, re-inject the resin to ensure a complete fill.
Allow the Resin to Cure
Once you've injected the resin and addressed any air bubbles, leave the area undisturbed for a few minutes. The curing time can vary, but it typically ranges from 5 to 10 minutes. If you're working in direct sunlight, keep the area covered to prevent premature curing of the resin.
By following these detailed steps for injecting the resin, you'll be well on your way to effectively patching your plastic windshield. Remember to refer to your repair kit's instructions and take your time with each step for the best results.
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Frequently asked questions
Small cracks and chips can be fixed with a DIY repair kit. Clean the area with an alcohol pad and gently scribe out any loose glass from the impact point. Center the patch over the damaged area and place it on the exterior of your windshield. Most patch kits include a plastic pedestal with an angled tube for epoxy application. Line up the tabs and press the pedestal against the adhesive. Fill the pedestal with liquid resin and use the syringe to compress it completely down into the pedestal.
Chips larger than a quarter and cracks longer than three inches require a professional product or a complete replacement. If left unaddressed, small cracks and chips will grow over time and require a full windshield replacement.
The cost of repairing a plastic windshield can start at $95. Depending on your insurance coverage, you may pay nothing.
Flying debris, stones, and gravel are common causes of chips and cracks in windshields. Park your car in a garage or shaded area to prevent cracks from spreading due to natural forces such as wind and rain.
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