TempShield is used as insulation against radiant heat transfer and can be used to its greatest advantage in instances where radiation is the predominant means of heat transfer. It is the bright aluminized film surface of all TempShield products that give it its insulating properties.SizeSq Ft Per Roll16" x 375'500 Sq Ft24" x 125'250 Sq Ft48" x 75'300 Sq Ft60" x 75'375 Sq Ft72" x 125'750 Sq FtTempShield Double Bubble Foil/Foil Reflective Insulation is 1/4" thick and is designed for walls, basements, crawl spaces, and metal buildings. Available in 300, 500, 750 sq. ft. rolls.Note: Tabbed versions have 1" tab on all sides.Key Features:Clean, lightweight, easy to installClass A / Class 1 Fire RatingHigh Thermal R-ValuesSaves energy and moneyVapor retardantHigh-Efficiency PerformanceThin, lightweight TempShield provides resistance against the three types of heat flow: conduction, convection, and radiation. It forms an effective barrier against moisture, air currents, and vapors .Easy to UseTempShield is lightweight, compact, and pliable; yet resistant to punctures, tears, and cracking. Installation is quick and simple, and it conforms easily to fit complex shapes.Cost-Effective and VersatileTempShield is an economical solution for a wide range of industrial, manufacturing, and consumer applications. It costs about half as much or less than the common conventional insulation.