Radiant Barrier Reflective Insulation, 25.5" wide 5000 sqft, Attic For the person that wants the best! The thickest and strongest Radiant Barrier product on the market. The increased strength of this material makes it the easiest to install. Available in Partials, 500, and 1,000 sq. ft. rolls or custom lengths beyond. Comes in perforated 4 widths or custom widths. US Energy Products is a construction / industrial grade Radiant Barrier reflective insulation. Key Benefits: - Thickest and strongest radiant barrier product on the market. - Allows for easier and quicker installation.