Sealant compounds for joints; water-tight rings for plumbing pipes; rubber sleeves for protecting parts of machinery; carbon fibers, other than for textile use; insulating materials; insulating refractory materials; insulating gloves; insulators for cables; insulating and protective interlayer dielectrics materials and coatings for use in integrated circuits, semiconductor devices, computer disk drives and other computer hardware; cords of rubber; rubber, raw or semi-worked; synthetic rubber