South korean automakers hyundai and kia use window glass with an spf between 44 and 48 in those vehicles they assemble in the u s.
Uv laminated car windows.
Uv radiation levels are generally much lower inside the vehicle than outside in full sunlight.
Some automakers like hyundai and kia are already using higher spf glass not only because it protects against uv rays but also because it helps cool down the car and thus improves fuel efficiency.
Laminated glass is made from laminated plastic between two layers of glass which is known to block 98 99 of all uv light.
The side window of your car is made out of a different type of glass tempered glass.
However uva transmission depends on the type of glass.
This exposure may prove especially damaging to long distance drivers.
To see whether car windows are protective boxer wachler took a uv a light meter to a number of los angeles car dealers on a cloudless may day in 2014.
Side and rear windows which usually have only a single layer of tempered glass may only block about 65 percent of incoming uv rays.
Laminated glass used for windscreens and tempered glass usually used for side and rear windows both block uvb radiation.
The problem though is that windshields only protect the front side of your face.