The present invention relates to select elastomeric blends including at least one halogenated random copolymer. In particular, the present invention relates to compositions including at least one halogenated random copolymer of isobutylene and methylstyrene, preferably para-methylstyrene; wherein the at least one halogenated random copolymer includes at least 9.0 wt % methylstyrene, preferably para-methylstyrene, based upon the weight of the at least one halogenated random copolymer; and at least one general purpose rubber. The invention also relates to articles made from these compositions and processes for making the same.