Do car windows block UV rays or do you need sunscreen while driving?

Think you’re safe from the sun in your car? Think again

Many people believe that sitting inside a car shields them from harmful sun exposure. While car windows do offer some protection, they don’t completely block ultraviolet (UV) rays — and that can put your skin at risk.

According to dermatology research, windshields block most UVB rays (the ones responsible for sunburn) but allow UVA rays to pass through. These rays penetrate deeper into the skin, causing premature aging, wrinkles, and increasing the risk of skin cancer over time.

Why you still need sunscreen while driving

Dermatologists strongly recommend wearing a broad-spectrum sunscreen (SPF 30 or higher) even if you spend most of your day driving.

• UVA exposure through side windows can lead to sun spots, uneven skin tone, and long-term damage.
• Studies show that drivers often develop more sun damage on the left side of their face and arms (driver’s side) compared to the right.
• Daily sunscreen use reduces risk of skin cancer by almost 50%, according to the Skin Cancer Foundation.

Windshield vs. side windows: What’s the difference?

• Windshield: Usually laminated and offers 95-99% UVA and UVB protection.
• Side and rear windows: Typically tempered glass, blocking UVB but allowing up to 60% of UVA rays to pass through.

You may like to read: Revolutionary sunscreen keeps you cool while shielding your skin

That’s why your arms, hands, and left side of your face are most exposed while driving.

Expert-recommended driving sun safety tips

✅ Apply sunscreen 15–20 minutes before driving
✅ Reapply every 2 hours on long drives or after sweating
✅ Choose tinted window films that block UVA rays for extra protection
✅ Wear UV-protective sunglasses to protect eyes and prevent cataracts
✅ Keep a travel-size sunscreen in your glove compartment

Bottom line

Car windows don’t give you full protection from the sun. If you care about your skin health, make sunscreen part of your driving routine. It’s a simple step that can save your skin from premature aging — and lower your cancer risk.

Stay informed and protect your health!

CLICK HERE TO JOIN Medical News Pakistan on WhatsApp for expert tips, health updates, and the latest medical research straight to your phone.