Fluorosilicone (also known as fluororubber) offers advantages over silicone in several key performance areas, particularly improved suitability in extreme environments. Below is a comparison of its key advantages:

Superior chemical resistance: Fluorosilicone can withstand strong acids (such as 98% concentrated sulfuric acid), strong bases, oils, and organic solvents (including aviation fuel), achieving the highest corrosion resistance levels in industry standards. Silicone, on the other hand, is only suitable for environments with weak acids and bases and water vapor and is easily damaged by highly corrosive media.

Better high-temperature stability: Fluorosilicone can operate stably at 250°C for long periods and can withstand temperatures exceeding 300°C for short periods. Its mechanical properties degrade more slowly at high temperatures. While silicone has a wider temperature resistance range (-60°C to 230°C), its lifespan at long-term high temperatures is shorter. Stronger Mechanical Strength and Wear Resistance: Fluorosilicone boasts a tensile strength exceeding 20 MPa and a hardness of up to 90 Shore A, offering excellent tear and abrasion resistance, making it suitable for high-wear applications. Silicone, on the other hand, has a tensile strength of only 5-10 MPa and a lower hardness (30-80 Shore A), making it flexible but susceptible to deformation under high pressure.

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More Demanding Applications: Fluorosilicone is widely used in extreme operating conditions such as aviation fuel systems, automotive engine seals, and petrochemical pipelines, offering greater reliability and durability. Silicone, on the other hand, is more limited to more conventional applications such as food-grade, medical, and electronic packaging.

However, fluorosilicone costs 3-10 times more than silicone and has poor low-temperature adaptability (down to approximately -20°C), while silicone remains elastic at -60°C. Overall, fluorosilicone is a better choice for applications involving severe corrosion, high temperatures, or heavy wear.