10M x 60CM ROLL. While primarily used behind radiators (insulating up to 6+), its multipurpose design also makes it ideal as a radiant barrier for walls, floors, roofs, sheds, camper vans, and more. The Blackspur BB-RF101 Reflective Radiator Foil Roll is a high-performance, economical solution designed to prevent heat loss and significantly reduce your household energy bills.