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

Shin-Etsu FE-343-U Fluorosilicone Rubber

Shin-Etsu FE-343-U Fluorosilicone Rubber is a high-performance liquid silicone rubber featuring exceptional resistance to fuels, oils, and extreme temperatures (–60°C to 200°C). It offers excellent compression set resistance, low-temperature flexibility, and superior chemical stability. Ideal for aerospace, automotive, and oilfield sealing applications requiring long-term reliability under harsh conditions.
  • shin etsu fe 343 u fluorosilicone rubber_a30b99d2
  • shin etsu fe 343 u fluorosilicone rubber_a30b99d2

Features Of Shin-Etsu FE-343-U Fluorosilicone Rubber

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

  2. Superior low-temperature flexibility with operational capability down to –60 °C.

  3. Enhanced thermal stability, maintaining performance up to +200 °C for extended periods.

  4. Outstanding resistance to ozone, weathering, and UV radiation without protective additives.

  5. Good compression set resistance, ensuring reliable sealing performance after prolonged stress.

Typical Applications Of Shin-Etsu FE-343-U Fluorosilicone Rubber

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

  2. Automotive turbocharger hose linings and under-hood sensor encapsulants.

  3. Oil & gas downhole instrumentation seals requiring chemical and thermal resilience.

  4. High-reliability medical device components in contact with sterilants and organic solvents.

  5. Military-grade electronic enclosures requiring EMI shielding compatibility and environmental durability.

Specifications Of Shin-Etsu FE-343-U Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (VMQ-F)
Product FormTwo-part liquid silicone rubber (LSR), Part A + Part B
AppearancePale amber, translucent viscous liquid (Part A); colorless to pale yellow liquid (Part B)
Cure SystemPt-catalyzed addition cure
Shore A Hardness (Cured, 7 days @ 150 °C)50 ± 3
Tensile Strength (ASTM D412)8.0 MPa min
Elongation at Break (ASTM D412)180% min
Primary ApplicationsDynamic and static sealing in extreme chemical/thermal environments


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