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

Dow SILASTIC 38640-V Fluorosilicone Rubber

Dow SILASTIC 38640-V Fluorosilicone Rubber is a high-performance liquid silicone rubber (LSR) offering exceptional resistance to fuels, oils, and extreme temperatures (–65°C to 200°C). It combines fluorosilicone chemistry with Dow’s precision LSR processing for excellent compression set, low volatility, and reliable sealing in aerospace and automotive applications.
  • dow silastic 38640 v fluorosilicone rubber_983aa8d2
  • dow silastic 38640 v fluorosilicone rubber_983aa8d2

Features Of Dow SILASTIC 38640-V Fluorosilicone Rubber

  1. Excellent resistance to aggressive fuels, oils, and solvents—including jet fuels (JP-4, JP-8), automotive fuels, and aromatic hydrocarbons.

  2. Broad operating temperature range from –65 °C to +200 °C with retained flexibility and sealing integrity.

  3. Superior compression set resistance compared to standard silicone elastomers, ensuring long-term seal performance under dynamic conditions.

  4. Good electrical insulation properties across wide temperature and humidity ranges.

  5. Compatible with standard high-temperature vulcanization (HTV) processing methods including compression, transfer, and injection molding.

Typical Applications Of Dow SILASTIC 38640-V Fluorosilicone Rubber

  1. Aerospace fuel system seals and gaskets for engines, tanks, and connectors.

  2. Automotive under-hood components exposed to hot oil, coolant, and fuel vapors.

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

  4. Military-grade hydraulic and pneumatic system seals subjected to extreme environmental stress.

  5. Industrial fluid handling systems where resistance to chlorinated and fluorinated solvents is critical.

Specifications Of Dow SILASTIC 38640-V Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (FVMQ)
Product FormHigh-consistency rubber (HCR), uncured compound
AppearanceOff-white to light tan, homogeneous gum stock
Primary ApplicationsStatic and dynamic seals, gaskets, diaphragms, O-rings
Key FeaturesFuel/solvent resistance, wide service temperature range, low compression set
Processing MethodHigh-temperature vulcanization (HTV)
Curing SystemPeroxide-curable
Shelf Life (unopened, 25 °C)12 months from date of manufacture


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