If you are looking for a reflective radiant barrier that will keep the heat out at all times, this reflective insulation roll is the one for you. It has excellent radiation protection effect and can reflect up to 97% of radiant heat. You can cover it on the items to be protected to avoid damage caused by overheating. The total length is 10 meters and the width is 1.2 meters. It has a large size and you can change it to the size you want.