Radiant Barrier Insulation Roll 1.5mm Foil Foam Core 800 Sq Ft Thermal Vapor Shi por | jul 30, 2026WHERE TO INSULATE?. SmartSHIELD -1.5mm 48″ x200ft Reflective Insulation roll 800 Sq. Ft., Foam Core Radiant Barrier, Thermal Insulation Shield – Foil / Foil 🌟. Easy to install, easy to cut, strong but lightweight.