Rubber, namely, semi-worked rubber, unprocessed rubber, natural rubber, liquid rubber, synthetic rubber; gutta-percha; gum, raw or partly processed; plastics in extruded form for use in manufacture; seals, namely, seals for pipe connections, rubber seals for cars; sealants, namely dust proofing sealants, general purpose silicone rubber sealant; fillers, namely, expansion joint fillers; insulation materials and articles, namely, insulating fabrics, insulating paints, insulating tape; gasket ma...