Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Shin-Etsu FE-251-U Fluorosilicone Rubber

Shin-Etsu FE-251-U is a high-performance fluorosilicone rubber offering exceptional resistance to fuels, oils, and extreme temperatures (−60°C to 200°C). It combines silicone flexibility with fluorocarbon chemical stability, enabling reliable sealing in aerospace, automotive, and oilfield applications. Excellent compression set resistance and low-temperature elasticity distinguish this premium-grade elastomer.
  • shin etsu fe 251 u fluorosilicone rubber_4d4d263e
  • shin etsu fe 251 u fluorosilicone rubber_4d4d263e

Features Of Shin-Etsu FE-251-U Fluorosilicone Rubber

  1. Excellent resistance to fuels, oils, and aggressive hydrocarbon-based fluids across wide temperature ranges.

  2. Outstanding high-temperature stability with continuous service capability up to 200 °C.

  3. Superior low-temperature flexibility down to –60 °C without embrittlement.

  4. Good compression set resistance for long-term sealing performance in dynamic applications.

  5. Enhanced plasma and ozone resistance compared to standard silicone elastomers.

Typical Applications Of Shin-Etsu FE-251-U Fluorosilicone Rubber

  1. Aerospace fuel system seals and gaskets exposed to jet fuels and synthetic lubricants.

  2. Automotive turbocharger hoses and under-hood sensors requiring thermal/chemical resilience.

  3. Oil & gas downhole instrumentation seals subjected to sour gas and high-pressure hydrocarbons.

  4. Industrial fluid handling components in chemical processing equipment.

  5. Medical device tubing and connectors requiring biocompatibility-compatible fluorosilicone performance.

Specifications Of Shin-Etsu FE-251-U Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (FVMQ)
Product FormUncured gum stock (high-consistency rubber)
AppearanceTranslucent to pale amber, homogeneous sheet or slab
Primary ApplicationsStatic and dynamic seals, gaskets, diaphragms, and molded parts
Key FeaturesFuel/oil resistance, wide service temperature range, low compression set
BenefitsExtended service life in harsh chemical environments, reduced maintenance frequency
Curing SystemPeroxide-curable (requires post-cure for optimal properties)
Shelf Life (unopened, 25 °C)12 months from date of manufacture


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