Alumaguard® flexible weather-proofing jacket is the original, self-healing membrane used on exterior duct-work, refrigeration and chilled water piping, tanks, vessels, and equipment. Alumaguard® is a composite membrane consisting of a multi-ply embossed UV-resistant aluminum foil/polymer laminate to which is applied a layer of rubberized asphalt specially formulated for use on insulated duct and piping applications. Alumaguard® out performs other common exterior weather barriers, laggings, or coatings, and, by providing exceptional UV protection, weather protection, vapor barrier, and mechanical protection; and simple ‘peel and stick’ installation!