Rubber O-rings are circular, loop-shaped gaskets with a round cross-section, designed to fit within grooves and be compressed during assembly to form a seal between two or more mating parts. When pressed between two surfaces, they block the passage of liquids or gases, preventing leakage through their elastic properties.
Despite their simple design, O-rings are critical components in a wide variety of pressure systems found across industrial, agricultural, automotive, aerospace, and many other applications. Their versatility, reliability, and cost-effectiveness have made them the most widely used sealing element in the world.

Material材料	Temperature Range温度范围	Key Properties关键特性	Common Applications常见应用
NBR (Nitrile / Buna-N) NBR（丁腈橡胶 / Buna-N）	from -40°C to +120°C (-35°F to 250°F) 从 -40°C 到 +120°C (-35°F 到 250°F)	Excellent oil, fuel, and petroleum-based fluid resistance; good tear resistance; cost-effective 优异的耐油、燃料和石油基流体性能；良好的耐撕裂性；高性价比	Automotive fuel and oil seals, hydraulic systems, general industrial sealing 汽车燃料和油封、液压系统、通用工业密封
FKM (Fluorocarbon )FKM（氟橡胶）	from -20°C to +200°C (-15°F to 437°F) -20°C至+200°C（-15°F至437°F）	High temperature resistance; excellent chemical resistance; low compression set 耐高温；优异的耐化学性；低压缩永久变形	Chemical processing, aerospace, oil & gas, automotive 化学加工、航空航天、石油与天然气、汽车行业
Silicone (VMQ)硅橡胶 (VMQ)	from -60°C to +230°C (-65°F to 450°F) -60°C 至 +230°C (-65°F 至 450°F)	Excellent heat, ozone, and corona resistance; best low-temperature flexibility; good dielectric properties 优异的耐热、耐臭氧和耐电晕性能；最佳的低温柔韧性；良好的介电性能	Static applications, medical, food processing, electrical insulation 静态应用、医疗、食品加工、电气绝缘
EPDM三元乙丙橡胶 (EPDM)	from -50°C to +150°C (-70°F to 275°F) 从 -50°C 到 +150°C (-70°F 到 275°F)	Excellent resistance to ozone, sunlight, weathering; good flexibility at low temperatures; steam and water resistance 优异的耐臭氧、耐阳光、耐候性；低温下具有良好的柔韧性；耐蒸汽和耐水	Automotive cooling systems, water and steam applications, outdoor seals 汽车冷却系统、水和蒸汽应用、户外密封件
Neoprene (CR)氯丁橡胶 (CR)	from -45°C to +110°C (-45°F to 230°F) -45°C 至 +110°C (-45°F 至 230°F)	Good weather and ozone resistance; moderate oil compatibility; excellent corrosion resistance against ammonia 良好的耐候性和耐臭氧性；中等的耐油性；优异的耐氨腐蚀性	Refrigeration, air conditioning, general-purpose sealing 制冷、空调、全年龄密封
HNBR	from -40°C to +150°C (-40°F to 300°F) 从 -40°C 到 +150°C (-40°F 到 300°F)	Improved heat and ozone resistance over NBR; excellent mechanical properties 比NBR具有更好的耐热和耐臭氧性；机械性能优异	High-temperature oil and fuel applications, automotive, aerospace 高温油和燃料应用，汽车，航空航天