This chapter provides an up-to-date account of reuse, recycling and devulcanization of natural and synthetic isoprene rubbers. Landfilling and waste utilization, grinding and pulverization, high pressure high temperature sintering, pyrolysis, microwave, ultrasonic, chemical, mechanochemical and biochemical devulcanization are discussed. Attention is paid to properties of the products made from recycled and devulcanized rubbers. Blending of natural and isoprene rubbers with virgin rubbers is discussed. structural changes occurring in rubbers during devulcanization are elucidated. The importance of recycling of rubbers without adding chemicals for their devulcanization and reuse of devulcanized rubbers in a factory floor are stressed. Future trends in rubber recycling are discussed.