RS-CR55 Pre Cured Black Neoprene®is a soft manageable material based on CR (Polychloroprene, also known as Neoprene) synthetic rubber, giving it excellent suitability for applications requiring resistance to chemicals such as acids, alkalies and certain organic fluids. It also has good heat resistance, with a continuous operating temperature of up to 90 ̊C. Better flame resistance, weather ability, and ozone resistance experienced with diene rubbers. The swelling resistance of the RS-CR55 to mineral, vegetable, and animal oils is also better than the non-polar diene based rubbers. It has good resistance to paraffinic and naphthenic oils of high molecular weight.