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

Dow SILASTIC LS 5-2040 Fluorosilicone Rubber

Dow SILASTIC LS 5-2040 Fluorosilicone Rubber is a high-performance elastomer combining silicone’s thermal stability with fluorocarbon’s fuel and chemical resistance. Ideal for aerospace, automotive, and oil & gas sealing applications requiring extreme temperature resilience (-60°C to 200°C) and compatibility with aggressive fluids like jet fuels, lubricants, and solvents. Offers excellent compression set resistance and low outgassing.
  • dow silastic ls 5 2040 fluorosilicone rubber_6c68dbbc
  • dow silastic ls 5 2040 fluorosilicone rubber_6c68dbbc

Features Of Dow SILASTIC LS 5-2040 Fluorosilicone Rubber

  1. Excellent resistance to fuels, oils, and aggressive hydrocarbon-based chemicals.

  2. Broad operating temperature range from –65 °C to +200 °C for long-term service stability.

  3. Superior compression set resistance compared to standard silicone elastomers.

  4. Good low-temperature flexibility and retention of physical properties after thermal aging.

  5. Fluorosilicone chemistry provides enhanced compatibility with aerospace and automotive fluid systems.

Typical Applications Of Dow SILASTIC LS 5-2040 Fluorosilicone Rubber

  1. Aerospace fuel system seals and gaskets exposed to jet fuels and hydraulic fluids.

  2. Automotive turbocharger hose liners and sensor seals in high-temperature under-hood environments.

  3. Oil and gas downhole instrumentation seals requiring resistance to sour gas and condensates.

  4. Military-grade avionics enclosures and environmental sealing components.

  5. Specialty industrial diaphragms and membranes handling aggressive solvents or lubricants.

Specifications Of Dow SILASTIC LS 5-2040 Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (FVMQ)
Product FormTwo-part liquid silicone rubber (LSR), platinum-cured
AppearanceTranslucent to light amber viscous liquid (Part A); colorless to pale yellow catalyst (Part B)
Primary ApplicationsHigh-performance static and dynamic seals in demanding fluid environments
Key FeaturesFuel/oil resistance, thermal stability, low compression set, low-temperature flexibility
BenefitsExtended service life in harsh chemical and thermal conditions; reduced maintenance and replacement frequency
Curing SystemPt-catalyzed addition cure (hydrosilylation)
Shelf Life12 months at 25 °C when stored unopened in original packaging


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