Radiant Barrier (Solid) 4'x250' - 1,000 sq ftEcoFoils Solid Radiant Barrier Foil enhances energy efficiency by reflecting radiant heat away from your living or work space. Built with a reinforced polyethylene core and metalized reflective surfaces on both sides, this material offers excellent durability while remaining easy to handle on the job. It blocks up to 96% of radiant heat, helping keep interiors cooler during hot months and retaining warmth in colder seasons. When all seams are sealed