How Long Does Headlight Restoration Last?

Why headlights yellow in the first place

Headlight lenses are polycarbonate plastic with a thin factory UV coating. Sun, heat, road salt and car-wash chemicals wear that coating away, and then UV light starts breaking down the plastic itself. That is the yellow, chalky layer you see.

Restoration removes that damaged plastic. Once it is gone, the lens is clear again but has no protection of its own, which is why the coating that goes on afterwards matters so much. We use GlasWeld COAT, a professional clear coat cured with UV light, which bonds to the lens and keeps the sun off the bare plastic.

How long each type of restoration lasts

• Toothpaste, bug spray or a quick buff: days to weeks, because nothing protects the lens afterwards
• Store-bought kit with a wipe-on sealant: often a few months to a year
• Professional restoration with a UV-protective clear coat: usually one to three years
• New headlight assemblies: years, though their factory coating wears out the same way over time

What makes a restoration last

• Removing all of the damaged layer, not just the surface haze
• A UV-protective clear coat, not just a wax or wipe-on sealant
• Letting the coating cure: skip automatic car washes for about a week
• Parking in a garage or shade when you can

What shortens it

Central Indiana is hard on headlights in both directions. Summer sun bakes cars parked outside at work and at home, and winter brings road salt and brine on I-69, I-465 and the state roads, which coats the front of the car for months.

• Parking outside all day, every day, facing the sun
• Harsh brushes and strong chemicals at automatic car washes
• Scraping ice or snow off the headlights with a hard scraper
• Pressure washing the lens from very close range

Keeping restored headlights clear

After the first week, wash the headlights the same way you wash the paint, with car soap and a soft mitt. A coat of spray sealant or ceramic detailer every few months adds a little extra protection on top of the clear coat. In winter, brush snow off the lens with a soft brush rather than scraping it.

Our warranty

Every restoration comes with a 1-year warranty. If your headlights yellow again within a year of the service, contact us and we will make it right.

Signs it is time to redo them

Restored headlights do not go from clear to yellow overnight. The first sign is usually a slight dullness or a faint tint at the top of the lens, the part that faces the sun. If you notice it within the warranty year, let us know. After that, the same restoration process works again, because the lens can be sanded and re-sealed.

Does it matter what car you drive?

Every plastic headlight yellows eventually, whatever the make. What makes the biggest difference is how the car is kept: daily outdoor parking and long sunny commutes wear the coating fastest. Larger, more upright lenses on trucks and SUVs catch more sun, so they often show yellowing sooner than small, sloped headlights.

LED and HID headlights still have the same plastic lens on the outside, so restoration works the same way and lasts about as long.