[ vulcanized fiber; ] synthetic rubber; [ rubber, raw or semi-worked; rubber valves; sealing and insulating materials, namely, sealing gaskets, insulating tapes; semi-worked synthetic resins as semi-finished products in form of pellets, rods, films and sheets; rings of rubber for use as sealings in automotive industry; ] latex for use as protective coatings for concrete, plastics, metals, rubbers, and surfaces working in corrosive media; [ latex for fabrics impregnation, for production of sea...