Gold Key Processing is a custom rubber compounding company. It offers mixing and processing technology for many aspects of custom rubber compounding. The company offers Intermix Technology, one of the best mixing processes available, and has two K6A mixing lines. Gold Key Processing also uses a dual-mill system for temperature control and stock blending. It also has a variety of laboratory testing equipment, such as viscometers, durometers, rheometers and compression curing presses. Gold Key Processing is located in Middlefield, Ohio.