Since most states have a VLT legal limit of around 50% for the front driver windows and windshield, factory tint is only applied to the rear half of vehicles windows to avoid breaking the law.
claim their privacy glass can reject a large percentage of UVA and UVB, but the infrared light is still able to pass through, allowing passengers to still feel heat from the sun.
Privacy glass does prevent some heat from entering the vehicle, although not nearly as effectively as a ceramic window film.
Some manufacturers, like Audi, Mercedes and Volvo Cars are now offering different types of glass in their vehicles to reduce heat from being transmitted into the cabin.
Many consumers attempt to match the privacy glass to their front windows and windshield when it is legal to do so in their local jurisdiction.