17 NON-METALLIC PACKINGS AND SEALS, NAMELY, NON-METALLIC SEALING CUPS FOR PUMPS; EXPANSION JOINTS AND OIL AND GREASE SEALS; NON-METALLIC GASKETS AND BULK GASKETING MATERIAL, FOR USE IN BOLTED FLANGED CONNECTIONS USED IN ALL INDUSTRIAL APPLICATIONS, INCLUDING POWER GENERATION, CHEMICAL AND OIL REFINING INDUSTRIES; LIQUID SEALER FOR THREADED PIPE JOINTS AND FLUOROCARBON RESIN FOR SEALING THREADED JOINTS