Window tinting or sunscreening devices include products of varying permanence, which reduce the adverse effects of the sun. The State of Washington recognizes limitations on the tinting devices that are permitted for use on vehicles.
The following materials are not permitted:
-Material that is applied by brush or spray
-Red, yellow, gold, or black material
Additionally, tinting may not be applied to, or suspended between, the driver and the windshield, or to the windows to the immediate right and left of the driver. These products may be applied to other windows only if they do not interfere with the driver's ability to see other vehicles, persons, or objects.
Additional limitations also apply. See Washington State RCW 46.37.430: Safety Glazing for additional information.