Window Film Depot is a 3M Authorized Window Film Dealer. We are a national supplier and installer of safety and security film products, including DefenseLite, a polycarbonate security product designed and tested for extra measures in security. Window Film Depot services security professionals, government buildings, schools and institutions, building owners, national retailers, engineers, design/build firms and ESCO's looking for affordable and sustainable installed film solutions across the US. (less)