Windshield Pitting: Why Your Glass Goes Hazy in Low Sun

You probably noticed it on the drive to work, heading east into the sunrise. The whole windshield goes milky. Oncoming headlights turn into starbursts at night. You ran the wipers and it got worse, not better. That is pitting, and it is not dirt.

What Pitting Actually Is

Every mile you drive, your windshield is being sandblasted. Grit, sand, and road dust hit the glass at highway speed. Each individual grain is far too small to leave a chip you would notice, but it takes a microscopic divot out of the surface. Do that for years and you end up with thousands of tiny craters spread across the entire outer layer.

Individually they are invisible. Together they scatter light. That is why pitting only shows up in specific conditions: low sun angle, oncoming headlights at night, or a wet road throwing glare back at you. At noon on a clear day the same windshield can look perfectly fine.

Around here it happens faster than most places. US-19 carries heavy commercial traffic, a lot of the Nature Coast sits on sand, and if you run the Suncoast Parkway daily you are putting highway miles on the glass in exactly the conditions that cause it.

The Honest Answer: Resin Cannot Fix Pitting

We repair chips and cracks, and we are not going to tell you we can fix this, because we cannot, and neither can anybody else using resin.

Chip repair works by injecting resin into one contained void. There is a single impact point, the resin goes in under pressure, it fills the space where the glass used to be, and UV light cures it solid. That process needs a defined void with an entry point.

Pitting is the opposite situation. There is no single void. There are thousands of them spread across the whole surface, each one a fraction of a millimeter across, with no way to inject anything into any of them. There is no version of chip repair that addresses pitting.

How to Tell Pitting From Something We Can Fix

This is worth two minutes in your driveway, because the two problems look nothing alike once you know what to check.

• Run a fingernail lightly across the glass. Pitting feels like fine sandpaper, evenly rough across a wide area. A chip is one spot you can catch your nail on.
• Look at the pattern. Pitting is spread across the whole windshield, usually worst on the driver's side where you get the most direct exposure. A chip is a single point of damage.
• Check when it bothers you. Pitting is a glare problem in low sun. A chip is visible any time you look at that one spot.
• Look for a center. Every repairable chip has an impact point where something hit. Pitting has no center because it is thousands of separate tiny impacts.

Plenty of windshields have both. If you have pitting across the glass and also picked up a rock chip last month, that chip is still repairable. The pitting is not, but the chip is, and sealing it still keeps it from turning into a crack.

What Actually Helps

For genuine pitting, replacement is the real fix. That is not our business and we have no reason to push you toward it, but it is the straight answer.

You will also see glass polishing offered as an option. Be careful with it. Polishing works by removing a thin layer of glass to level out the divots, and taking material off a curved windshield can introduce optical distortion in the area that was polished. On the driver's side, a distorted patch can be worse to look through than the pitting was.

One thing worth knowing: pitting is a safety issue, not just an annoyance. Glare at night and into low sun genuinely reduces what you can see. If it has reached the point where you are squinting on your normal commute, it is time to deal with it.

If you are not sure which one you have, call or text a photo. Patrick will tell you honestly whether you are looking at pitting or a chip he can seal, and if it is pitting he will say so instead of driving out to your house to tell you in person.