Check the listing for details. SmartSHIELD -5mm 48"X50ft Reflective Insulation Roll, Foam Core Radiant Barrier. Condition: New. Listed at 129.99 USD. SmartSHIELD -5mm 48"X100ft Reflective Insulation Roll, Foam Core Radiant Barrier, Thermal Foil Insulation - Engineered Foil ALL IN ONE PRODUCT: INSULATION + RADIANT BARRIER + VAPOR BARRIER + SOUND BARRIER. THIS IS NOT A CHEAP DOUBLE BUBBLE REFLECTIVE INSULATION, WE HAVE A SUPERIOR QUALITY REFLECTIVE FOAM CORE INSULATION, COMMERCIAL GRADE!!! WHERE TO INSULATE? Attics, Ceilings, Walls, Steel Buildings, POLE BARNS, Roofing, Concrete Floor, Radiant Heat in a Concrete Floor, Radiant Heating Under a Wood Floor, Cathedral Ceiling, Water Heater Tank, Radon Barrier, Water Pipe and Air Duct, Reflective Ceiling System, Behind a Hot Water Radiator, Crawl Space, In Ground Swimming Pools, Shed, Fish & Hunting Shelter, Cooling Room, Cold Chamber or Wine Cellar, Concrete Block Wall, Cavity Wall for Metallic Studs in Commercial Buildings, Foundation Wall, Above Ground Swimming Pools, Quanset Hut, House Wrap. EXTREMELY EFFECTIVE - Reflects 95% of radiant energy, perfect RADIANT BARRIER. R-value up to 15.67 ( with one layer), up to 21.10 ( with two layers).VAPOR BARRIER - prevents condensation, unaffected by humidity and moisture, mold resistant!MEETS OR EXCEEDS ALL ASTM C1313 STANDARDS - Class A Fire Rating (E84 with E2599 mounting). Corrosion resistance according to D3310 is achieved by a proprietary clear coating applied to the Engineered Foil surface.INDUSTRIAL / COMMERCIAL GRADE - SmartSHIELD -5mm Foam Core Reflective Insulation is TEAR & PUNCTURE PROOF, but you can easily cut it with utility scissors. Both sides reflects 95% of the radiant heat.PAYS FOR ITSELF - by reducing heating cost in winter and cooling cost in summer. NON TOXIC - will not irritate skin, eye or throat. Non allergic.