According to the Cancer Council of Australia
- Clear glass blocks about 97% of the UVB radiation and about 37% of UVA radiation.
- Laminated windscreens block all of the UVB radiation and about 80% of the UVA radiation.
- Windscreen films can reduce the transmission of UVR further so that as much as 97% of the UVA is blocked, depending on the quality of film used.
Source from a PDF File at www.cancer.org.au
Clear car glass has a protection factor of about 13, which is equivalent to a good sunscreen, while some window tints, for example, film tinting for car windows, have protection factors of 500.
Australian Safety and Compensation Council (ASCC)
ISBN 978 0 642 32829 8 (PDF online)