The TesaMoll aluminium radiator foil reduces energy loss through the walls by reflecting the heat from your radiator back into your home. With this your house stays nice and warm, you use less energy and you save money. The foil is made of a special insulating foam coated with aluminium foil. You simply attach the foil behind your wall radiator with double-sided tape or another adhesive. The TesaMoll radiator foil measures 1m x 0.7 m.