Cool where it counts. 3M™ Cooling Film is a highly reflective performance film engineered to help keep vehicles cooler without using additional energy. Applied to vehicle roofs, it uses proprietary technology to reduce heat buildup by reflecting sunlight and releasing heat away from the surface. Designed for a wide range of fleet, rail, and transportation applications, 3M™ Cooling Film helps improve comfort, reduces heat exposure to temperature sensitive cargo and saves fuel or electricity.