Keep your room cool and sealed with NASA Tech SOLID Foam Core radiant barrier. You can completely line NASA TECH Foam Core radiant barrier to your ceiling, walls, and floors. Easy to install. Recommend using spray glue or a staple gun. Foam Core Radiant barrier is made from polyurethane for strength and durability. Inner layer of foam core insulation prevents conductivity of heat flow while the outer layer is covered with a Metalized Mylar for an optimum reflection.