Super Mat is flexible, durable, breathable and corrosion resistant. It has a one-sided silicone coating, 1 mm thick. It does not impair breathability. Perfect as weather/ rain barrier where suitable as an alternative to metal jacket. It is constructed of type E fiberglass and impregnated with fluorocarbon resins. It has very good thermal conductivity and is easy to cut and install. There is no dust from particulate.