CR stands for Chloroprene Rubber, a synthetic elastomer known for its excellent flexibility, weather resistance, and flame-retardant properties. In wire and cable applications, CR is widely used as a jacketing or insulating material and is also recognized by its trade name, Neoprene.
Chloroprene Rubber (CR) is a high-performance synthetic rubber produced through the polymerization of chloroprene. Developed as one of the earliest alternatives to natural rubber, CR provides superior mechanical strength, chemical stability, and environmental resistance. In cable construction, it is valued for its ability to remain flexible across a wide temperature range while maintaining resistance to oil, ozone, sunlight, and abrasion.
When used as a cable jacket or insulation layer, CR serves as a protective barrier against physical wear, environmental exposure, and flame hazards. Its inherent flame retardancy helps cables meet stringent safety standards, while its mechanical durability ensures long-term performance in dynamic or harsh operating environments. This combination of properties makes CR ideal for use in power, control, and AV cables that require flexibility and resilience in demanding commercial and industrial conditions.
CR’s dielectric strength also contributes to reliable electrical performance, minimizing signal loss and maintaining insulation integrity under stress. These qualities make it a versatile material for flexible cords, portable power cables, and outdoor-rated cable assemblies used in manufacturing, construction, and AV installations.
Cables utilizing CR insulation or jacketing are certified by UL (Underwriters Laboratories), CSA (Canadian Standards Association), and ASTM (American Society for Testing and Materials). These organizations define requirements for flame resistance, oil resistance, dielectric performance, and mechanical endurance to ensure safety and reliability in electrical applications.
Chloroprene Rubber was developed by DuPont in the 1930s under the brand name Neoprene as one of the first synthetic rubber alternatives to natural rubber. Its chemical composition gave it superior resistance to oxidation, oils, and environmental degradation, establishing it as a reliable material for industrial and electrical uses. Over time, CR became a standard choice for cable insulation and jacketing, offering consistent performance in a wide range of applications.