The only things I could think of would rear side and rear windows for SUV, minivans, etc where "privacy glass" is an option. Tinted front windows and windshields are illegal in many, if not most, states so I doubt anyone would make them for Mustangs. Having said that my tint film, installed on all except the windshield, is four years old in sunny SoCal and look as good as the day it was installed.