As SRP Rubber Solutions, in addition to our standard rubber compound formulations, we develop custom-designed technical rubber compounds tailored to your requirements, fully compliant with ASTM and DIN standards. Rubber Compound Types NR – Natural Rubber SBR – Styrene Butadiene Rubber EPDM – Ethylene Propylene Diene Rubber CR – Chloroprene Rubber (Neoprene) NBR – Nitrile Rubber HNBR – Hydrogenated Nitrile Rubber IIR – Butyl Rubber