Peptizer for Natural/ Synthetic Rubbers is made using a conventional blend of pentachloro thiophenol, organo-metallic complexes, organic and inorganic dispersing agents. The Peptizer considerably accelerates the peptizing of Natural Rubber and Synthetic Rubbers at mastication temperature above 80 Degree C. Peptizer is available in powder, pellet and prill forms. Peptizer for Natural/ Synthetic Rubbers has longer shelf life and comes in various grades to cater to specific requirement.