polyvinyl chloride (rigid and flexible) or EPDM rubber.Headquartered in the heart of the Midwest in Marietta, Ohio, Dimex operates a spacious 220,000 square foot manufacturing facility with state-of-the-art equipment. From custom compounding to extrusion/calendaring to finishing, Dimex products meet rigorous quality specifications through careful engineering, in-line testing and quality control. And because we are involved in the manufacturing from start to finish, our lot and serial tracking systems allow products to be traced all the way back to their original plastic compound.