Installers use infrared lamps and thermometers to demonstrate film performance, but you can get a rough sense yourself. Once the film has cured, park with the sun on one side and lower a window partway, then hold your hand behind the tinted section and the open gap in turn. The difference in how the sunlight feels gives you a simple, everyday impression of what the film is doing. For a proper comparison, ask your installer to show you the specifications for the exact film and shade.
Did you know Kepler film is also used for commercial window tinting? Explore our commercial services