Aluminum foil heat insulation Material:AL+bubble+AL Roll size: W 1.2m*L 40m ... -barrier, heat-preservation and energy-saving functions in housing construction (roof, wall, and floor). Material structureAL/bubble/ALBubble diameter ... friendly;2.Light, soft, dust free, fire retardant, easy to install;3.Heat reflection, heat insulation, sound insulation, anti-radiation, anti-vibration, and shielding; ...