HAPFLEX 1000 products are a series of tough, colorless, low Shore A durometer elastomers. HAPFLEX 1000 products are used in both: mechanical applications - i.e. parts, gaskets, molds, fixtures and …….. electrical insulation applications - i.e. potting and encapsulating. Colorless castings and high strength are key attributes of the HAPFLEX 1000 Series.