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This is a reflective radiant barrier: double-sided aluminum foil bonded to a foam core, sold as a 40 in. wide, 25 ft. long roll. It works by reflecting radiant heat rather than absorbing it, and the maker claims it reflects up to 97% of radiant heat. That makes it a fit for attics, roofs, floors, duct wraps and other spots where you want to cut radiant heat gain or loss. It is not a substitute for mass insulation like fiberglass or foam board, so treat it as a supplement. Compared with plain bubble foil, the foam core gives it more body and slightly better conduction resistance, but it is still thin and depends on an air gap to perform.
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This is a radiant barrier heat insulation roll made of aluminum foil with a foam layer. It comes in a 40 in. x 25 ft. size. The material has no odor and is water resistant.
It has a 2-layer aluminum structure. The second layer has double-layer bubbles that block heat transfer. It reflects 97% of radiant heat. The double-layer foil seals well, which helps limit heat loss.
In summer it blocks ultraviolet light. In winter it helps keep heat indoors. Uses include roof insulation, floor heating laying, library insulation, communication cable, bag lining and thermal insulation bags.
