Back side windows: Any tint darkness can be used. ... Those of you who research Ontario window tint laws elsewhere please ensure you are reading up to date content.
Window tint is measured as a percentage of light that can pass through the window. Every state or county is able to set their own laws on an allowable tint limit. The common allowable limits are 50 percent for the driver’s front and passenger’s front window, and 35 percent for the rear passenger or side windows and the rear windshield.