Does a windshield block UV rays?
Reviewed by the Skyview Auto Glass technical team — NWRD-, ASE- and DINITROL-trained technicians · Updated November 2026
Quick answer
Yes. The plastic interlayer in a laminated windshield filters most ultraviolet light, so the windshield blocks the bulk of UV that reaches it. Ordinary tempered side and back glass filters less, which is why some drivers notice sun exposure more on the side facing the window. This is general information, not medical advice.
Do car windows block UV?
A windshield is laminated, built from two glass layers bonded to a plastic interlayer, and that interlayer filters most of the ultraviolet light that reaches the glass. Visible light passes through, so the windshield looks clear, but the UV that causes sunburn is largely absorbed by the plastic layer. This is a property of the laminate itself, not an added coating, so every laminated windshield has it.
Side and back glass behave differently. Most of it is tempered, a single sheet of strengthened glass with no interlayer, and ordinary tempered glass filters less UV than a laminate. Some drivers notice more sun exposure on the arm or face nearest a side window on a long drive, and that difference in filtering is part of why. Laminated side glass, used on some newer vehicles, filters more, closer to a windshield.
Solar or infrared-reflective glass adds a metallic coating that reflects heat, and that coating can also reduce what passes through the glass, but the core UV filtering of a windshield comes from the laminated interlayer. None of this is medical advice; for questions about sun exposure and skin, a doctor or dermatologist is the right source.
Windshield vs side glass and UV
Laminated windshield
- Two glass layers with a plastic interlayer.
- The interlayer filters most ultraviolet light.
- Visible light passes, so the glass looks clear.
Tempered side and back glass
- A single strengthened sheet with no interlayer.
- Filters less UV than a laminated windshield.
- Some newer vehicles use laminated side glass, which filters more.
The interlayer is what makes a windshield filter more UV than ordinary tempered side glass.
UV and auto glass myths
Car glass blocks all UV, so you cannot get sunburned through a window.
A laminated windshield filters most UV, but ordinary tempered side glass filters less. Some drivers notice more exposure on the side nearest a window. This is general information, not medical advice.
Only tinted glass blocks UV.
The laminated interlayer filters UV without any tint. Tint film can reduce visible light and heat, but the core UV filtering of a windshield comes from the laminate, not from colour.
A replacement windshield blocks less UV than the original.
A replacement matched to the VIN carries the same laminated construction, so the UV filtering stays the same as the original glass.
More questions about UV and auto glass
Can you get sunburned through a car window?
A laminated windshield filters most UV, but ordinary tempered side glass filters less, so exposure through a side window on a long drive is possible. This is general information; for questions about sun exposure and skin, ask a doctor or dermatologist.
Does auto glass block UVA?
The laminated interlayer in a windshield filters most ultraviolet light, including much of the UVA that reaches it. Tempered side glass without an interlayer filters less. The filtering is a property of the laminate, not an added coating.
Does tinting help with UV?
Tint film can reduce visible light and heat, and some films also reduce UV transmission. A windshield already filters most UV through its interlayer. Tint installation is a separate service from glass replacement.
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