APF 7 is a quick setting industrial use filler paste. It is specifically formulated for use in the aircraft, aerospace, and other industries that perform manufacturing and repair work on items requiring above normal temperature ranges. The service temperature for APF 7 is up to 400°F (204°C). APF 7 is both chemical and water resistant and may be used in underwater applications. Applications of APF 7 are both fast and permanent. Excellent machining and finishing results are achieved by grinding, sanding, scraping, etc. When exposed to elevated temperatures APF 7 has a tendency to darken, however, it does not gas, bubble, or cause any finish distortion. This product does not contain wax and bonds readily to itself or other substrates such as FRP/SMC, high-temperature epoxy molds, aluminum, steel, cast iron, urethane foam parts, and others. APF 7 is non-metallic, non-conductive, and non-sparking. It contains no styrene and is low odor.