Construction: Fiberglass Cloth and Aluminum Foil are laminated with Adhesive or polyethylene. Applications With high tensile strength and excellent abrasive-resistance, alum.foil fiberglass cloth lamination is mostly used as a vapor barrier for duct wrap, and a facing for duct board and pipe insulation. It is also used as radiant barrier for its low emissivity and high reflectivity. Different sizes are available. We also supply foil fiberglass with other type of fiberglass cloth.