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

Dow SILASTIC LS-70 Fluorosilicone Rubber

Dow SILASTIC LS-70 Fluorosilicone Rubber is a high-performance elastomer combining silicone flexibility with fluorocarbon chemical resistance. Designed for extreme environments, it offers exceptional stability against fuels, oils, solvents, and elevated temperatures up to 200°C. Its low compression set and broad operating range make it ideal for aerospace, automotive, and oilfield sealing applications requiring long-term reliability under harsh conditions.
  • dow silastic ls 70 fluorosilicone rubber_9528def1
  • dow silastic ls 70 fluorosilicone rubber_9528def1

Features Of Dow SILASTIC LS-70 Fluorosilicone Rubber

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

  2. Outstanding low-temperature flexibility down to –60 °C with retained elastomeric properties.

  3. Superior thermal stability up to 200 °C for continuous service and short-term exposure to 230 °C.

  4. Good compression set resistance, ensuring long-term sealing performance under dynamic and static conditions.

  5. Compatible with standard silicone processing equipment and vulcanization methods (e.g., peroxide-cured).

Typical Applications Of Dow SILASTIC LS-70 Fluorosilicone Rubber

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

  2. Automotive turbocharger hose couplings and sensor O-rings in high-temperature engine compartments.

  3. Oil & gas downhole tool components requiring chemical resistance in sour gas environments.

  4. Military-grade hydraulic system seals subjected to MIL-PRF-25988 and MIL-DTL-46167 specifications.

  5. High-reliability semiconductor manufacturing equipment seals exposed to fluorinated solvents and plasma etch gases.

Specifications Of Dow SILASTIC LS-70 Fluorosilicone Rubber

Chemical TypeFluorosilicone elastomer (FVMQ)
Product FormUncured gum stock (sheet or roll)
AppearanceTranslucent to light amber, homogeneous elastomeric sheet
Primary ApplicationsStatic and dynamic seals, gaskets, diaphragms, and molded parts
Key FeaturesFuel/oil resistance, low-temp flexibility, thermal stability, compression set resistance
Processing MethodCompression molding, injection molding, extrusion (peroxide-cured)
Cure SystemPeroxide-curable (requires post-cure for optimal properties)
Standard ComplianceMeets ASTM D1418 classification: FVMQ; compatible with AMS 3330/3331


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