Nonmetal stuffing rings for sealing; Nonmetal water-tight rings for sealing; Weatherstripping compositions for sealing or insulation of houses, vehicles, industrial machines, tubes, pipelines, valves, motors, pumps, shafts, flanges; [ Soundproofing materials; ] Insulating materials; Insulating refractory materials; insulating materials for retaining heat; Sealant compounds for joints; Expansion joint fillers; Cylinder joinings; Pipe gaskets for connecting pipe flanges; Joint packings for plas...