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

Dow SILASTIC LS 5-8720 Fluorosilicone Rubber

Dow SILASTIC LS 5-8720 Fluorosilicone Rubber is a high-performance liquid silicone rubber from Dow’s SILASTIC LS series, offering exceptional resistance to fuels, oils, and extreme temperatures. It cures rapidly via platinum-catalyzed addition reaction, delivers excellent mechanical properties, low compression set, and outstanding chemical stability—ideal for demanding aerospace, automotive, and energy applications requiring long-term reliability.
  • dow silastic ls 5 8720 fluorosilicone rubber_2ba3bea0
  • dow silastic ls 5 8720 fluorosilicone rubber_2ba3bea0

Features Of Dow SILASTIC LS 5-8720 Fluorosilicone Rubber

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

  2. Outstanding low-temperature flexibility with continuous service capability down to –60 °C (–76 °F).

  3. Superior thermal stability for long-term performance at elevated temperatures up to 200 °C (392 °F).

  4. Good compression set resistance, maintaining sealing integrity under prolonged stress and thermal cycling.

  5. Processable via standard high-temperature vulcanization (HTV) silicone rubber equipment and techniques.

Typical Applications Of Dow SILASTIC LS 5-8720 Fluorosilicone Rubber

  1. Aerospace fuel system seals and gaskets exposed to jet fuels (e.g., JP-4, JP-8) and synthetic lubricants.

  2. Automotive under-hood components requiring resistance to engine oils, transmission fluids, and exhaust exposure.

  3. Oil & gas downhole elastomeric parts subjected to sour gas (H₂S), crude oil, and high-temperature wellbore conditions.

  4. Military-grade hydraulic and pneumatic seals operating in extreme environmental and chemical service conditions.

  5. Specialty industrial seals for chemical processing equipment handling aromatic solvents and chlorinated hydrocarbons.

Specifications Of Dow SILASTIC LS 5-8720 Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (FVMQ)
Product FormHigh-consistency gum stock (uncured compound)
AppearanceOff-white to light tan, homogeneous rubbery sheet or slab
Primary ApplicationsStatic and dynamic seals, gaskets, diaphragms, and O-rings
Key FeaturesFuel/oil resistance, low-temperature flexibility, thermal stability
Processing MethodHigh-temperature vulcanization (HTV) with peroxide cure system
Cure Temperature Range150–175 °C (302–347 °F)
Shelf Life (unopened, 25 °C)12 months from date of manufacture


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