JSC “Devulco” uses internally developed devulcanizing agents, protected by patent applications. When they are mixed with source rubber and processed in mechanical shear devices, the sulfur cross-links are disrupted due to chemical interactions. The resulting product can be mixed with virgin rubber and vulcanized again. The employed devulcanization process is based on the recognized effectiveness of several chemical mechanisms: free radical R• , organic cations R+ and acid / base A+ / B-. Synergy between these mechanisms and tribologic effects in mechanical shear devices leads to the degree of devulcanization above 80% as determined by ASTM D 6814 standard