FIELD: production of elastomer compositions. SUBSTANCE: elastomer composition is prepared. Fibrides of poly(m-phenylene-isophthalimide) or of polyacrylonitrile, are added into it, quantity of said fibrides is 1-30 mass parts per 100 mass parts of elastomer. Composition may additionally contains pulp of poly(p-phenylene terephthalimide). Undried fibrides and commonly used additives e. g. antioxidants, filler, sulfur, accelerators) are added into said composition. Then mixing in mixer, grinding and hardening within 30 min at 160 C and at pressure 8.625 kPa is carried out. EFFECT: improved quality of desired product. 8 cl, 17 tbl
