Silicone O Ring Seal
Silicone (VMQ) O-rings are composed of silicon, oxygen, hydrogen, and carbon. It is an elastic seal made from organic silicon as raw material, which is widely used in scenarios with high requirements for environmental protection, hygiene, and temperature adaptability due to its excellent high and low temperature resistance, biocompatibility, and insulation. It has significant differences from the strong corrosion and high temperature and high pressure positioning of fluororubber (FKM) O-rings, and has good flexibility and compression permanent deformation performance, but is not resistant to acid, extreme pressure oil, fuel, gear oil, ketones, and benzene. In addition, it has low tensile strength and poor wear resistance, making it unsuitable for dynamic applications.
Its temperature range is from -51°C to 204°C , making it suitable for static applications. It performs well in fields such as medical care, food, pharmaceuticals, semiconductors, automobiles, aerospace, and electronics, especially excellently in dry heat and ozone environments.




The advantages of silicone (VMQ)
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The temperature range is from -51°C to 204°CF, and some formulations can reach up to 232°C |
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Good insulation |
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Excellent ozone resistance and weather resistance |
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Food-grade compatibility |
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Electrical insulation and compatibility |
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Physiological neutrality property |
Common Materials
- Nitrile (NBR): Oil-resistant, ideal for fuel systems and hydraulic applications.
- EPDM: Excellent weather/ozone resistance, used in outdoor and automotive cooling systems.
- Silicone: High-temperature flexibility (-60°C to 230°C), suitable for food/medical industries.
- Neoprene: Good chemical/ozone resistance, used in industrial gaskets.
- FKM (Fluoroelastomer): Extreme heat (up to 250°C+) and chemical resistance (acids, oils, fuels). Used in aerospace, oil/gas, and aggressive environments.
Material Selection Guide
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Requirement |
Recommended Material |
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Oil + Cost-Effective |
NBR |
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High-Temperature |
FKM,Silicone(VMQ) |
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Weather Resistance |
EPDM |
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Food/Medical Grade |
Silicone |
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Chemical Inertness |
PTFE |
Tianjin Maojie Rubber and Plastic Products Co., Ltd. is a company specializing in the research and development and production of special rubber and plastic products. The company possesses advanced mold development capabilities and advanced automatic rubber vulcanization equipment. The company specializes in manufacturing FKM high-temperature resistant and acid and alkali resistant fluororubber products, HNBR high-temperature resistant, highly wear-resistant and acid and alkali resistant hydrogenated butyl rubber parts, tear-resistant silicone products and ethylene propylene diene monomer (EPDM) rubber. MDI, NDI, PPDI, and high-quality polyurethane products. Our company will strictly demand that our products be improved in appearance, wear resistance, high-temperature resistance, acid and alkali resistance, and aging resistance without end. We look forward to cooperating with friends.





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