The Reflectix® Concrete Slab Insulation is an innovative, easy-to-handle product that increases the energy efficiency of radiant floor and snow melt systems (under concrete). The foil within the product, acts to spread out the heat signature of heating coils resulting in a more even floor / slab surface temperature. The Concrete Slab Insulation is available through Contractor Sales Groups or Industrial / Commercial Building Product Suppliers. The product consists of one layer of aluminum bonded to an external layer of white polyethylene and internally bonded to two layers of heavy gauge polyethylene bubbles (total thickness 5/16 in). A standard width of 4 feet is available in lengths of 50 ft, 100 ft and 125 ft.