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.
Laminated glass is made from laminated plastic between two layers of glass which is known to block 98 99 of all uv light.
Side and rear windows which usually have only a single layer of tempered glass may only block about 65 percent of incoming uv rays.
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.
The problem though is that windshields only protect the front side of your face.
This exposure may prove especially damaging to long distance drivers.
Uv radiation levels are generally much lower inside the vehicle than outside in full sunlight.
However uva transmission depends on the type of glass.
Uv rays can pass through clouds and glass.
Don t count on this degree of protection to safeguard you against uv altogether when you occupy a vehicle.
Laminated glass used for windscreens and tempered glass usually used for side and rear windows both block uvb radiation.