The traditional entry-level of film that is applied to automotive glass is a dyed window tint. It’s essentially an elevated privacy glass, that is available in multiple opacities (or darkness). The film is comprised of an adhesive layer on the bottom, dyed layer in the middle, and a coating of polyester on the surface.
The adhesive sticks to the window, the dye helps to aid in blocking UV A and UV B rays, while the outside polyester coat reduces the potential of scratching. However, this entry-point of window tint is prone to cracking and does not hold up long. It also is not good at blocking infrared radiation – which creates heat inside the vehicle. Additionally, with excessive exposure to sunlight, the film tends to turn purple – which reduces visibility.