Best Windshield Repair Kits: Fix Cracks & Chips With These Top Products
The top windshield repair kits to correct chips and cracks in your automotive glass.
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BY Noelle Talmon / LAST UPDATED ON March 30, 2021
That small chip in your windshield might only be an eyesore today, but it can quickly spread and may even cause problems with the man when it’s time to get your car inspected. Having automotive glass replaced isn’t a huge deal, but it can get expensive and there’s no reason to spend that much money if you can repair the damage yourself. We picked the best windshield repair kits for this list so you can get your glass looking good as new.
This kit is good for multiple repairs, and cracks vanish when examined at a 45-degree angle. It works best on 1-inch-wide round damage or smaller and cracks tinier than 12 inches.
- Fills in chips and small cracks nicely and makes them hardly noticeable
- Easy to use
- Doesn't take much time to complete a repair
- Simple to clean up
- Kit cannot patch large holes
- Instructions are somewhat technical
- Product has a strong odor
- Can adhere to your skin if you don't wear gloves
Consisting of a glass resin, this windshield repair kit is excellent at preventing the spread of cracks. It reduces the look of chips and returns the seamless appearance of the windshield.
- Kit is priced affordably for any budget
- Comes with everything you need to fill in chips and cracks
- Can prevent further damage
- Kit isn’t designed for larger cracks
- Not able to fix extensive damage
- Only viable when used right after crack occurs
This premium kit is capable of fixing more extensive damage than most at-home kits and can be used for more than 200 repairs.
- Top-quality components and an array of tools and resins make this professional-grade windshield repair kit the most capable option on our list
- Premium tools and large quantities of resin come with a serious jump in price, so expect to pay 10 times what you’d spend on a traditional DIY repair kit
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Our reviews are driven by a combination of hands-on testing, expert input, “wisdom of the crowd” assessments from actual buyers, and our own expertise. We always aim to offer genuine, accurate guides to help you find the best picks.
Benefits of Windshield Repair Kits
- Be a responsible driver. Even small chips and cracks have the potential to compromise your windshield’s structural integrity, so you’ll want to have them repaired at the first opportunity. Damage to your car’s glass can also impede your line of sight, and might even cause you to fail your state’s safety inspection.
- Spend less. Fixing a damaged windshield is certainly more affordable than replacing it with a new one, even if you don’t shell out the big bucks for OEM glass. Many drivers find that their insurance doesn’t cover windshield replacement. If you have a high deductible, you may end up paying out of pocket anyway.
- Get results fast. Cracked windshields don’t repair themselves. We recommend treating your repair kit like your first aid kit or flat tire kit, and keeping it in your car so it’s ready when you need it.
- Prevent the problem from getting worse. Most chips and small cracks can be repaired easily, but every bump and temperature change they experience while you procrastinate can make them grow so large that your entire windshield needs to be replaced.
- You don’t have to be a pro to get professional results. The chemicals in most of these products do all the work, so all you have to do is follow simple instructions. Don’t let a cracked windshield intimidate you; there’s a good chance you can fix the problem right at home.
Types of Windshield Repair Kits
The best windshield repair kits utilize resin with a high viscosity that makes the substance resistant to flowing and thereby more stable. In order to create a tight bond to the glass, the resin should also prevent shrinkage. Synthetic resins commonly include the ingredients methacrylate and acrylic acid as well as hydrogen, carbon, and oxygen.
We’re just going to head this one off at the pass and point out that nail polish is not an automotive repair product. How long does a coat of nail polish last on fingernails? How long do you think it will last on your car’s windshield? Besides, even if you manage to make a chip or crack less visible, nail polish won’t do anything to restore the stability of your glass. It’s not a viable solution and we’re going to consider this case closed.
Blue Star Products, Inc.
Blue Star Products, Inc. is located in Hauppauge, N.Y. The company prides itself in designing simple-to-use products that produce a high-quality professional result without requiring special skills or training. Founder Gerald Jacino is formerly the president and co-owner of Clear Star Products, Inc., incorporated in 1978. One recommended product is the Blue Star Windshield Repair Kit.
Permatex, founded in 1909 and based in Hartford, Connecticut, manufactures premium chemical products for automotive maintenance and repair as well as the home and hardware markets. Products include gasket makers, sealants, hand cleaners, thread lockers, adhesives, cleaners, repair kits, and lubricants. One recommended product is the Permatex Flowable Silicone Windshield and Glass Sealer.
Rain-X has been one of the leading companies in aftermarket glass care for more than 40 years. Founded in 1972, the company is currently owned by ITW Global Brands. Its portfolio includes a variety of car-care products, including wiper blades and glass cleaners, car washes, waxes, and headlight restoration kits. One top product is the Rain-X Windshield Repair Kit.
Windshield Repair Kit Pricing
- Under $20: Good news: even the best windshield repair kits can be had for just a few dollars. At that price, we’re having a hard time thinking up reasons not to have one in your car.
- $200 and up: Yes, it’s a big jump, but premium windshield repair kits can yield professional results and are available to the public. If you’re on a first-name basis with your windshield repair tech, it might be time to upgrade.
Severity of Damage
Windshield repair kits are powerful tools, but they aren’t magic. They do their best work on chips and cracks caused by a single impact; think back to the last time a piece of gravel launched off a truck and turned your windshield into its own personal dartboard. Long cracks, compound cracks caused by larger objects, and damage that looks like a spider web are typically beyond repair and warrant a new windshield.
- Sensitivity to Temperature. In order to cure the resin patch, the best windshield chip repair kit will include instructions on the best temperature range to make the fix. Most kits recommend curing the repair in direct sunlight, while others say the exact opposite. It's essential to follow the product's directions in order for the resin to properly cure.
- Resin Quality. The best windshield repair resin repairs chips and cracks, but it needs to be a high-quality substance. When looking for the best windshield repair kit, find one that has a denser and thicker material that dries clearly. You want the resin to blend into the windshield without leaving a big blemish. Lower-grade resin kits may dry in a pale yellow shade.
- Volume. One windshield repair kit should be suitable for a one-time repair on a small crack on a single windshield. If you're repairing more than one windshield, you will need a kit that can be used more than once. If a single repair looks like it will require multiple kits, you’re most likely in replacement territory.
Best Windshield Repair Kits Reviews & Recommendations 2021
- Fix windshield damage as quickly as possible. The longer you wait, the higher your chances of making the problem worse. Every mile you drive with a chip or crack is an opportunity for it to spread, and any dirt that makes its way into the damaged area will be visible after the repair is finished.
- Windshield repair kits are not a substitute for replacement. While properly applied resin will restore the structural integrity of your glass, it won’t eliminate visual damage and you’ll still be able to see where the repair was made. Don’t worry, though, you’re probably the only one who will notice.
- Look for a kit that has all the accessories required for the job: resin, an injector, curing strips, adhesives, applicators, and a razor blade. Alcohol wipes, pushpins, and a pedestal are also great to have to complete the task.
- When repairing a crack, make sure it isn't bigger than 1.5 inches in diameter. Also, make sure a star- or flower-shaped crack is smaller than 6 inches in length.
- Be patient when repairing your windshield. Take your time, thoroughly read the directions, and become familiar with all the tools before you start the project. If you rush, you may make a mistake.
- The first step to a quality repair is cleaning the surface. Remember that any dust left behind will become trapped in the resin and remain visible after it hardens. The residue left on the surface can also affect the resin’s ability to properly bond with your glass.
- When spreading the resin, determine how much pressure you need to apply (too much can make the crack worse). Use only quality resin, and smooth it out enough so that the windshield wiper blades don't get caught on the substance and loosen the patch.
- When you finish using the windshield repair kit and the resin solidifies, use a razor blade to scrape excess resin away from the windshield. Then clean the glass with a cloth.
- Not all windshield damage can be repaired. Before you spend your time and money on a do-it-yourself repair kit, thoroughly inspect the damage and determine if a replacement windshield is required.
Q: Is it better to repair or replace a cracked windshield?
If the crack or chip is smaller than the size of a quarter, a windshield repair kit can do the job just fine. A good-quality DIY kit will prevent a rock chip or crack from expanding but will not remove the damage, and correcting a cracked window is not very costly. In fact, professionals use similar or identical techniques to repair small chips and cracks. However, if the crack, bullseye, or star is directly in front of your line of sight, you may want to replace the windshield. Also, if your vehicle is old, the windshield may not hold up as well under stress and probably should be replaced.
Q: How do I use a windshield repair kit?
Position the applicator over the crack, and insert the extension base over it. Put the resin tube over the extension and tighten it until resin replaces the air inside the applicator. Press the syringe to insert six to 10 drops of resin inside the applicator. Put the provided screw inside the resin chamber, and turn it clockwise until it tightens. The resin will press against the glass. After five to 10 minutes, unscrew and remove the applicator.
Q: How do you keep a windshield crack from spreading?
There are ways to delay the inevitable, but a cracked windshield is only going to get worse. Every bump and change in temperature has the potential to damage your windshield beyond repair. You can even cause a crack to spread just by touching the glass with your finger. Take our advice and fix the problem before it’s too late.
Q: Can I use a windshield repair kit on other things?
Sure! If the alternative is to throw something away, it might be worth your time to try repairing it with one of these kits. We’ve heard of people repairing everything from old-school glass headlights to the glass in a procure frame.
Our pick for the best windshield repair kit is the Rain-X Windshield Repair Kit. The biggest benefit is that it can be used for multiple repairs. It is also easy to use and makes chips and cracks significantly less visible.
For a less expensive option, consider the 3M Windshield Repair Kit.
For a premium option that’s good enough for the pros, take a look at the Clearshield Auto Glass Repair Kit.