How to Repair Scratched Car Windshield?

[KiaraDella]

Car windshield scratches can be repaired using a specialized windshield repair agent. Here is the relevant introduction to car windshield repair: 1. Precautions: Only the front windshield can be repaired because it is laminated glass, which generally does not suffer large-scale cracks. Repairs are only possible under these conditions. 2. Classification of Glass Damage: One type is bullseye or star-shaped cracks. Bullseye damage is circular, resembling a dent; star-shaped cracks radiate outward from the impact point, resembling a spider web. Generally, if the diameter of bullseye damage exceeds 3cm, it is too severely damaged to repair. Star-shaped cracks with diameters over 30cm are very difficult to repair, and even if repaired, there is no guarantee in terms of quality and appearance.

[JackDella]

Having driven for over a decade, I've dealt with windshield scratches no less than ten times. Minor scratches can actually be fixed by yourself—just buy a glass repair kit for around a hundred bucks. The process is quite simple: first, clean the glass thoroughly, apply the curing agent to the scratch, cover it with a film, and smooth it out with a squeegee. Then, let it sit in the sun for half an hour, and it's done. I always keep one in my car. Last year, a small crack from a stone hitting my windshield on the highway was repaired so well it became nearly invisible. However, deep cracks should never be forcefully repaired, as damaging the glass structure can be dangerous. In such cases, it's best to visit a professional shop for resin injection. Also, a quick reminder: when car washes offer free glass cleaning, be extra cautious about sand particles in their towels—they’re the easiest way to scratch your glass.

[DelRiley]

A scratched windshield severely impairs visibility, especially when headlights from oncoming vehicles shine on it at night, making it even more hazardous. I suggest first running your fingernail over the scratch—if your nail catches on the depth, don't attempt any DIY fixes. For superficial scratches, you can try using cerium oxide polishing powder mixed with a little water, applying it in slow circular motions, but avoid power tools. Last time I watched mechanics at an old auto repair shop, they still used this traditional method to restore glass on classic cars. Deep scratches require UV-cured resin treatment, but depending on the location—if it's in the driver's line of sight—it's better to replace the glass entirely. Oh, and don't believe those online toothpaste remedies; I tried it twice and ended up making the glass surface even hazier.

[DiDaniella]

Repairing a windshield depends on the location and depth of the scratches. For scratches in the wiper area, I recommend replacing it directly, as it's too dangerous if the wipers can't clean properly during rain. For small scratches on the outside, buy a repair kit and apply it yourself, but make sure to work in a shaded area—resin can bubble if the temperature exceeds 30°C. Avoid washing the car for three days after the repair. Once, I used a high-pressure washer the next day, and the entire repair layer peeled off. For oil film scratches on the inside, a kitchen degreaser spray works best—glass cleaners tend to leave water marks. A reminder: don’t sand glass with heating wires casually. I ruined the heating function on my car’s rear windshield by sanding it.