NFRC - The National Fenestration Rating Council is a non-profit organizations that administers independent, third party rating and labeling system for the energy performance of products designed to provide energy efficiency including window tinting films. Hot Spot Tinting offers window films that meet the high standards set by the NFRC, and that provide the highest quality and reliability of all tinting film products worldwide.
Tint Center - A very comprehensive and extremely informative website about automobile window tinting. See samples of various tints, compare brands, and more.
Window Film Information Center - A site sponsored by the International Window Film Association with plenty of helpful information on window tinting films.
Auto Window Tinting - A very helpful site with an interactive tint film demo.
Window Film Magazine - The site's content is targeted towards industry professionals, but much of the content serves as helpful information for consumers.
International Window Film Association - (We area Member) This association establishes standards for the tinting industry. The IWFA website has very helpful consumer information on window film types.