For the projects that deserve the very best. This construction grade and industrial grade Radiant Barrier reflective insulation is the thickest and strongest Radiant Barrier product on the market. It can be used in the same applications as our renowned Super R Plus with the addition of extra strength and rigidity. The increased structural strength of this material makes it the easiest to install. Available in 500 and 1,000 sq. ft. rolls. Perforated or solid depending on application.