There are different series of window films. The main types of tint are a Full Metal tint, HP Metalized tint and the Non-reflective tint for automotive. The full metal is very shinny and has no polyester and the HP films are a metalized and polyester.
The Non-reflective window tint or film is a UV stabilized window film and has no metal. All the film which once applied on window glass will reduce ingress of heat and other solar radiation through the window. The HP and Metalized tint as well as the newest series of NR films carry a lifetime guarantee.