Windscreen Repair: Fix It Kits Explained

Dealing with a chip or crack in your car's windscreen can be a real nuisance. Not only does it impair visibility, potentially posing a safety risk, but it can also be a costly repair or replacement. However, a growing number of motorists are turning to 'Fix It' scratch and chip repair kits as a viable and often very effective solution. These kits promise to minimise the appearance of damage, stop it from spreading, and even strengthen the affected area, all for a fraction of the cost of a professional replacement. But what exactly is a 'Fix It' scratch remover kit, and how does it work its magic?

Understanding Windscreen Damage

Before delving into the specifics of repair kits, it's crucial to understand the nature of windscreen damage. Windshields are made of laminated glass, typically consisting of two layers of glass with a layer of polyvinyl butyral (PVB) sandwiched in between. This construction is designed for safety; if the glass breaks, the PVB layer helps to hold the fragments together, preventing them from scattering.

Chips and cracks usually occur when a small stone or piece of debris impacts the outer layer of the glass. A chip is typically a small, localised damage, often circular or semi-circular. A crack, on the other hand, is a more linear fracture that can extend across the glass. Both types of damage can worsen over time due to temperature fluctuations, vibrations from driving, and even car washes, as air and moisture can penetrate the damaged area, causing further delamination and spreading the fracture.

What is a 'Fix It' Scratch Remover Kit?

A 'Fix It' scratch remover kit, in the context of automotive glass, is a DIY product designed to repair minor chips and cracks in a windscreen. The core principle behind these kits is to inject a special resin into the damaged area. This resin is typically a clear, viscous liquid that, once cured (often by UV light, either from the sun or a supplied UV lamp), hardens and bonds the glass fragments together. The primary goals of using such a kit are:

• Minimise Appearance: To make the damaged area less noticeable, often rendering the repair almost invisible.
• Stop Spreading: To prevent the chip or crack from extending further across the windscreen, which could necessitate a full replacement.
• Strengthen: To restore some of the structural integrity to the damaged glass, making it more resistant to further damage.

The kit commonly includes:

• A repair resin: A specially formulated liquid that fills the void.
• An applicator or pedestal: To hold the resin in place over the damage.
• A curing strip or film: Often a transparent strip placed over the resin to help it cure evenly.
• A razor blade or scraper: To carefully remove excess cured resin.
• Instructions: Detailing the step-by-step process.

How Do These Kits Work? The Process Explained

While specific instructions may vary slightly between brands, the general process for using a 'Fix It' windscreen repair kit is as follows:

1. Preparation is Key

Before you begin, ensure the windscreen is clean and dry. Any dirt, dust, or moisture trapped in the chip or crack will compromise the repair. You might need to gently clean the area around the damage. Crucially, the repair should be attempted in a shaded area but with access to sunlight for curing, or under direct UV light, as per the kit's instructions. Avoid direct sunlight during the application phase to prevent premature curing of the resin. For the best results, repairs should be made as soon as possible after the damage occurs, before dirt and water have a chance to enter the fracture.

2. Sealing the Damage

The kit usually comes with a pedestal or applicator that is placed directly over the chip or crack. This often uses a suction cup or adhesive to create a seal. This seal is vital as it helps to draw out air and moisture from the damaged area and creates a confined space for the resin to be injected.

3. Removing Air

Many kits include a syringe or a mechanism to create a vacuum. This is used to draw out any trapped air from the chip or crack. Removing air is critical because air is a poor conductor of light and will make the repair more visible. A thorough air removal ensures the resin can penetrate completely.

4. Injecting the Resin

Once the air is removed, the repair resin is injected into the damage. This is often done under pressure to ensure the resin fills every tiny part of the chip or crack. The goal is to displace any remaining air and fill the void completely with the clear resin.

5. Curing the Resin

After the resin has been injected, it needs to cure. This is typically achieved using ultraviolet (UV) light. Many kits rely on natural sunlight. You'll place the curing strip over the repaired area, and then expose it to direct sunlight for a specified period (often 10-20 minutes, depending on the intensity of the sun). Some more advanced kits might come with a small UV lamp for controlled curing.

6. Final Touches

Once the resin is fully cured and hardened, the pedestal is removed. Any excess resin on the surface of the windscreen is then carefully scraped away using the supplied razor blade or scraper. The aim is to leave the surface smooth and clear. The repair should now be significantly less visible, and the structural integrity of the glass should be improved.

Benefits of Using a 'Fix It' Kit

There are several compelling reasons why a motorist might opt for a DIY windscreen repair kit:

• Cost-Effectiveness: This is perhaps the biggest advantage. A replacement windscreen can cost hundreds of pounds, whereas a repair kit is typically under £20. Even if the repair isn't perfect, it can prevent a more expensive replacement.
• Convenience: You can perform the repair yourself at your own time and place, without needing to book your car into a garage.
• Time-Saving: The entire process can often be completed in under an hour, compared to the time it takes to arrange and undertake a professional replacement.
• Environmental Impact: Repairing a windscreen is more environmentally friendly than replacing it, as it reduces waste and the energy required to manufacture a new one.
• Preventative Maintenance: By stopping cracks from spreading, you are effectively performing preventative maintenance, safeguarding your windscreen from further, more serious damage.

When is a 'Fix It' Kit Suitable?

It's important to understand the limitations of these kits. They are generally most effective for:

• Bullseye chips: Where the impact point is a small, circular hole.
• Star breaks: Where the impact point has several small cracks radiating outwards.
• Spiderweb cracks: Short, linear cracks that haven't spread too far.

These kits are generally not suitable for:

• Damage that spans the entire thickness of the glass.
• Cracks that are longer than a few inches (check kit-specific limits).
• Damage that is very close to the edge of the windscreen, as this can be a structurally critical area.
• Multiple, overlapping cracks or extensive spiderwebbing.
• Damage that has been previously repaired poorly.
• Scratches that are deep and have removed glass, rather than just surface marring.

It's always wise to consult the specific instructions and limitations provided with your chosen repair kit. Some kits are more robust than others.

Tips for Success

To maximise your chances of a successful repair:

• Read the instructions carefully: Don't skip this step, even if you're familiar with the process.
• Work in the right conditions: Avoid extreme temperatures and direct sunlight during application.
• Be patient: Ensure you follow each step thoroughly, especially the air removal and curing stages.
• Cleanliness is paramount: A clean working area leads to a better bond.
• Consider the type of damage: If the damage is extensive or complex, a professional repair or replacement might be the only option.

'Fix It' Kit vs. Professional Repair

While DIY kits are excellent for minor damage, professional windscreen repair services offer a more advanced solution. Professionals use specialised equipment and resins that can often achieve a more aesthetically pleasing and structurally sound repair, especially for larger or more complex chips and cracks. They have the expertise to assess the damage accurately and determine the best course of action. However, for small, simple chips, a DIY kit can be a remarkably effective and economical alternative.

Here's a quick comparison:

Frequently Asked Questions

Q1: Can I use a 'Fix It' kit for a deep scratch?

A: Generally, no. These kits are designed for chips and cracks where there is a void to fill with resin. Deep scratches where glass has been removed are unlikely to be repaired effectively by these kits, and the result may be unsightly.

Q2: How long does a repair made with a 'Fix It' kit last?

A: If applied correctly to suitable damage, a repair can last for the lifetime of the vehicle. However, the longevity can depend on the quality of the repair, the type of damage, and the ongoing stresses on the windscreen.

Q3: Will my insurance cover a windscreen repair?

A: Many insurance policies offer windscreen cover with no excess, meaning you can get minor chips repaired for free. It's always worth checking your policy or contacting your insurer. Professional repairs are often preferred by insurers.

Q4: What if the repair doesn't work?

A: If the repair is unsuccessful, you may still be able to get the windscreen professionally repaired or replaced. The cost of the DIY kit is usually minimal compared to the potential cost of a full replacement.

Q5: Can I use this on side or rear windows?

A: These kits are specifically formulated for laminated windscreens. They are generally not recommended for tempered glass found in side and rear windows, as tempered glass shatters into many small pieces upon breaking, and the repair process is different.

Conclusion

'Fix It' scratch remover kits offer a practical and affordable solution for motorists looking to address minor damage to their windscreens. By understanding the process, the limitations, and following the instructions diligently, you can effectively minimise the appearance of chips and cracks, prevent them from worsening, and potentially save yourself a significant amount of money compared to a full windscreen replacement. For minor damage, these kits are a true game-changer, empowering you to take control of your car's maintenance and keep your vision clear and unobstructed.