Darkness of tint is measured by Visible Light Transmission percentage (VLT%). In Washington, this percentage refers to percentage of visible light allowed in through the combination of film and the window.
Similar to sunglass lenses, some tinting film contain metallic elements that help in reflecting incoming light and reducing the glare and heat generated by visible light.
The tint color(s) of Red, Gold, Yellow, or Black, are not legal by state law, neither are mirror finish products or sprayed on products.
Dual side mirrors are required if back window is tinted.
Manufacturers of film need to certify the film they sell in the state. Ask your dealer if they are using ceritified film.
The sticker to identify legal tinting is required between the film & glass on the driver’s side window.
State allows medical exemptions for special tint. For more details about the specific terms of the exemption, consult your state law.
You may tint your vehicle to 24% VLT for the front doors of any SUV. The back half can be any darkness you prefer. As for passenger vehicles, you may tint up to 24% on all windows except the windshield. All windshield tinting can only be tinted to a max of 6" from the top or the as1 mark. The article below is from the Washington State Patrol as of 2009. With this in mind, we do offer an assortment of window film options, and can help guide you to a film that fits your indvidual needs.
Window tinting laws vary from state to state and province to province. Before applying any window tinting materials, you should thoroughly review the appropriate state regulations as well as local enforcement policies to insure compliance with all applicable standards.