Liquid rubber; synthetic rubber * namely, polyisoprene rubbers *; [ rubber, raw or semi-worked; ] latex rubber for use in manufacture of cable, carpets and rugs, drilling muds for use in oil well drilling, imitation leather, spinning machines, paper, paints, impregnating fishing net and textiles, tarred felts, tires, shoes, raincoats, rubber gloves, rubber sheets, and wallpapers; [ weatherstripping compositions, namely, non-metal weather strips for buildings; insulating materials;] rubber mat...