The influence of rubbers, trans-polynorbornene, polyisobutylene P-200 and sevilene on vulcanization characteristics, physical-mechanical and dynamic properties of rubber used for the manufacture of products in contact with sea water has been investigated. It has been established that the developed rubber with a sulfur vulcanizing system based on rubbers SKMS-30ARK, SKN-4065 and BK-1675 with additives of trans-polynorbornene and sevilene 118-08-340 has improved physical and mechanical characteristics, resistance to sea water and increased dynamic properties.