For great long-term performance, select the Garage Door Insulation Kit from Cellofoam North America Inc. It's made with modified expanded polystyrene, a rigid, foam plastic with resilient closed cells. The benefits include permanent R-value, inherent water resistance, excellent physical strength and dimensional stability. Cellofoam garage door panels make your garage and workshop a more attractive and quieter space while reducing your monthly energy waste and lowering utility bills. Energy efficient expanded polystyrene (EPS) Core R-value approximately 4.75 Per Panel High-impact polystyrene (HIPS) laminate facer Kerfing for quick and easy installation Easy-to-follow DIY instructions included Pieces offer clean, professional appearance and are washable for easy maintenance Kit covers one standard 9 ft. wide garage door; a two-car or two-door garage requires two kits Each piece measures a nominal 20 in. W x 54 in. L x 1-1/4 in. D