Gila 3-in-1 Heat Control Window Film combines advanced heat and glare rejecting technologies with low reflectivity material to create a product that is effective and nearly invisible. This adhesive-based film is engineered to provide a fast, easy installation that adheres firmly to flat glass surfaces. No need for professional installers, this film is hassle free and perfect for DIY projects. The film reflects UV rays while allowing in natural light and maintaining your view of the outside. Its energy efficient, too. Blocking heat can lead to lower cooling costs and increase comfort in rooms with direct sunlight.