Working with High Consistency Rubbers

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A high consistency rubber, or HCR, consists of a high molecular weight polymer combined with reinforcing filler to produce a material that can be molded, extruded, or calendered into a useful end product. An HCR has the consistency of clay when uncured and is primarily formulated in a one- or two-part system (peroxide and platinum catalysts respectively). Known for high mechanical strength, HCRs are also sometimes referred to as high tear rubbers or high tear elastomers (HTRs or HTEs).