When sourcing rubber and elastomer components for sealing and vibration damping applications, understanding material properties is the foundation of making informed decisions. The terms "rubber" and "elastomer" are often used interchangeably, but they represent distinct categories with different characteristics that directly impact performance, cost, and suitability for specific applications.
Natural Rubber (NR) remains one of the most widely used elastomers globally, accounting for approximately 28% of the industrial rubber market [4]. Derived from latex harvested from rubber trees (Hevea brasiliensis), natural rubber offers exceptional elasticity, high tensile strength, and excellent tear resistance. These properties make it ideal for applications requiring repeated flexing, such as vibration mounts, bushings, and dynamic seals. However, natural rubber has limitations: it performs poorly in environments with oils, fuels, and ozone exposure, and its properties degrade at temperatures above 80°C.
Synthetic Rubber encompasses a family of engineered materials designed to overcome natural rubber's limitations. The most common types include:
NBR (Nitrile Butadiene Rubber): Known for exceptional oil and fuel resistance, NBR is the fastest-growing synthetic rubber segment at 6.3% CAGR [4]. It's the material of choice for fuel system seals, hydraulic gaskets, and oil-resistant vibration dampers. NBR performs well from -40°C to +120°C.
EPDM (Ethylene Propylene Diene Monomer): Excellent weather, ozone, and heat resistance make EPDM ideal for outdoor sealing applications, automotive weatherstripping, and HVAC gaskets. It handles temperatures from -50°C to +150°C but has poor oil resistance.
Neoprene (CR): Offers balanced properties including moderate oil resistance, good weathering, and flame resistance. Common in wetsuits, laptop sleeves, and industrial gaskets where multiple environmental factors must be managed.
SBR (Styrene Butadiene Rubber): The most produced synthetic rubber (40.2% of synthetic rubber share [4]), primarily used in tires, conveyor belts, and general-purpose seals where cost-effectiveness is critical.
Thermoplastic Elastomers (TPE) represent a revolutionary category that bridges the gap between rubber and plastic. Unlike traditional thermoset rubber, TPE can be melted and reprocessed, making it recyclable and easier to manufacture. TPE now commands 81.18% of the elastomers market by volume [3], growing at 6.4% CAGR [2]. TPE offers faster cycle times, consistent quality, and the ability to overmold onto rigid plastics—making it increasingly popular for consumer electronics, medical devices, and automotive interior components. However, TPE generally cannot match the heat resistance of thermoset rubber for applications exceeding 150°C.

