WINDSHIELD CHIP REPAIR PROCESS

Windshield chip repair works by removing trapped air from the damaged area. The specialized resin replaces the trapped air. The resin works through the break and is then cured with a UV light. This process helps restore strength and prevents the damage from spreading.

Windshield chip repair isn't about making the damage disappear. The goal is to stabilize the damaged glass by removing trapped air and replacing it with a clear resin.

Using a windshield repair injector, vacuum helps draw air out of the damaged area. Pressure is then used to push resin through the chip and into the small cracks extending from it. This process may be repeated to help the resin reach as much of the damaged area as possible.

Once the break has been filled, the resin is cured with UV light. The hardened resin helps bond and stabilize the damaged area. Thus reducing the chance of the chip spreading into a larger crack.

The repair will look better afterward but some evidence of the original impact will remain. Windshield chip repair is primarily a structural repair, not a cosmetic one.

Every rock chip is different but the basic repair process follows the same principle. Inspect and prepare the damage. Remove trapped air, fill the break with repair resin and cure the resin with UV light.

A rock chip isn't simply an empty hole that can be filled from the top. The damage can contain small fractures filled with trapped air. For the repair resin to properly fill those fractures, that air needs somewhere to go.

During the repair, the injector alternates between vacuum and pressure cycles. Vacuum helps draw trapped air out of the break. Pressure helps push resin into the small cracks extending from the impact point.

This process may be repeated several times during the repair. Some breaks fill quickly, while others take more time. Pressure/vacuum cycles are needed for the resin to reach the ends of the fractures.

As clear resin replaces the air inside the break, the dark areas of the chip become much less noticeable. This gives the technician a visual sign of how well the resin is penetrating the damage.

Why not just put resin on top of the chip?

Simply covering the surface wouldn't properly fill the internal fractures. The goal is to get repair resin inside the break. The trapped air is replaced with resin throughout the damaged area before the resin is cured.

Windshield repair resin is a specialized liquid. It is designed to flow into the fractures created when a rock damages a windshield.

During the repair, the resin is worked through the break while it is still liquid. This allows it to penetrate the small cracks and spaces where air is trapped. Different parts of a windshield repair will use resins with different properties. For example, a thicker pit resin is used to finish the surface impact point.

Once the damaged area has been properly filled, the resin is exposed to UV light. The UV light causes the resin to cure and harden inside the break. Thus helping bond and stabilize the damaged glass.

The cured resin is clear and has optical properties designed for glass repair. Replacing trapped air with resin makes many of the dark areas and fractures less noticeable.

Does the resin make the rock chip disappear?

No. Resin can improve the appearance of a rock chip but it cannot reverse the physical damage caused by the original impact. A small scar, impact mark or visible fracture lines may remain after a successful repair.

Not every windshield rock chip needs to be drilled. Often, the existing impact point provides enough access for resin to enter the damaged area.

Sometimes, crushed glass or the structure of the break can restrict access to the internal damage. A technician may carefully use a small carbide drill to open or clean the impact point. This will create a better path for the repair resin.

The goal isn't to drill through the windshield. Only a small amount of glass is removed from the outer layer. This is necessary to help the resin reach areas that would otherwise be difficult to fill.

Whether drilling is needed depends on the type and condition of the individual rock chip. A good repair uses only as much preparation as necessary to properly fill the break.

Does drilling make the rock chip worse?

When performed correctly, drilling is a controlled preparation technique that improves resin access. It isn't necessary for every repair and shouldn't be done simply as a routine step.

Yes. Evidence of the original rock chip will usually remain after a windshield repair.

As resin replaces the air inside the break, many of the dark areas and fractures can become less noticeable. Some repairs have a significant cosmetic improvement, while others remain more visible.

The final appearance depends on several factors. For example, the type and severity of the damage. How long the rock chip has been there. Contamination inside the break. And the amount of physical glass damage caused by the original impact.

The primary purpose of windshield chip repair is to stabilize the damaged glass and help prevent the chip from spreading. It is not to make the windshield look brand new again.

Even after a successful repair, you may still see the original impact point, a small scar or portions of the fracture when looking closely.

Actual windshield chip repair. Cosmetic results vary depending on the damage.

A fresh rock chip is generally easier to repair than one exposed to the elements for weeks or months.

The tiny fractures inside the chip can be exposed to moisture, dirt, windshield washer fluid and other contaminants. Over time, these materials can work their way into the break.

Contamination can make it difficult for repair resin to penetrate the damaged area. This may affect the cosmetic appearance of the finished repair. This is one reason an older rock chip may remain more noticeable after a repair.

Temperature changes, road vibration and normal flexing of the windshield can also cause an untreated chip to spread. Once the damage develops into a longer crack, a standard rock chip repair may no longer be possible.

If you notice a new rock chip, keep it clean and dry. Place a piece of scotch tape over top of the damaged area. Get the rock chip repaired as soon as possible for the best opportunity for a good result.

Just got a rock chip?

Avoid washing the windshield or pushing on the damaged area before your appointment. If possible, place a small piece of clear tape over the impact point to help keep dirt and moisture out.

Windshield rock chip repair may look simple. Successfully filling a break involves more than placing an injector over the damage and adding resin.

Different types of rock chips behave differently during a repair. The technician needs to identify the structure of the break first. Then they must prepare the impact point properly. Next, they must position the injector correctly. Lastlt, the technician must watch how the resin is moving through the damaged glass.

Some breaks fill quickly. Others may contain stubborn air pockets or fracture lines. Stubborn breaks will need extra vacuum and pressure cycles. Careful manipulation of the glass or extra preparation will help the resin reach the ends of the damage.

Proper curing and finishing matter too. The resin needs to cure before the surface is finished and the repair is inspected.

The goal isn't simply to make the chip look better. It's to fill and stabilize as much of the damaged area as possible. All while avoiding unnecessary stress on the windshield.

Does the repair equipment do everything automatically?

No. The repair system provides the vacuum, pressure and resin needed to fill the break. The technician still needs to check the repair and adjust the process based on how the individual rock chip responds.