Fluoropolymers / Alfa Chemistry



What Is Fluorosilicone?


Fluorosilicone, also known as fluorosilicone rubber, is a versatile class of materials that combines the advantageous properties of silicone rubber with the excellent chemical resistance and thermal stability of fluoroelastomers. It exhibits excellent chemical resistance to fuels, oils, solvents, and other harsh chemicals, making it ideal for applications in the automotive, aerospace, and industrial sectors. Fluorosilicone also has a wide operating temperature range, typically from -60°C to 200°C, enabling it to withstand extreme temperature variations.

Fluorosilicone is a synthetic elastomer composed of a backbone of silicon and oxygen atoms, with fluorine atoms attached to the silicon atoms. This unique molecular structure endows fluorosilicone rubber with excellent properties, making it suitable for demanding applications in harsh environments. Leveraging our expertise in the field, Alfa Chemistry offer a comprehensive range of fluorosilicone products, such as fluorosilicone elastomer, and fluorosilicone oil, etc.

Features & Applications of Fluorosilicone

  • Chemical Resistance
    One of the primary reasons for the popularity of fluorosilicone is its excellent resistance to a wide range of chemicals, including fuels, oils, solvents, acids, and bases.
  • Thermal Stability
    Fluorosilicone exhibits exceptional thermal stability, allowing it to withstand high temperatures without losing its physical properties. It can retain its elasticity and flexibility even at elevated temperatures, making it suitable for applications where exposure to extreme heat is a concern.
  • Low Compression Set
    Fluorosilicone maintains its shape and elasticity over time, even when subjected to compression or deformation. This property, known as low compression set, ensures reliable performance and long-term durability of fluorosilicone-based products.
  • Excellent Weatherability
    Fluorosilicone possesses remarkable resistance to weathering, UV radiation, and ozone exposure. This makes it suitable for outdoor applications that require resistance to environmental factors.
  • Electrical Insulation
    Fluorosilicone exhibits good electrical insulating properties, making it ideal for applications in the electronics and electrical industries. It can effectively seal and protect sensitive electronic components from moisture, dust, and other contaminants.


Fluorosilicone vs. FKM vs. Silicone

Fluorosilicone (FVMQ), fluorocarbon elastomer (FKM), and silicone (VMQ) are three types of elastomers commonly used in various industries. Each of these materials has its unique characteristics and properties, making them suitable for different applications. By understanding these key features, you can make informed decisions when choosing an appropriate elastomer for their specific requirements.

Key performance comparison reference of FVMQ, FKM and VMQ

Tensile Strength (MPa)3.4-9.71.4-10.33.4-20.7
Tensile Modulus at 100% (MPa)3.1-
Hardness Durometer (shoreA)35-8020-9050-95
Enlongation (%)100-480100-900100-500
Compression Set RatingFair-GoodGood-ExcellentGood-Excellent
Low Temp Range °F-122 ~ -90-178~-90-50 ~ 0
Low Temp Range °C-80 ~ -68-117 ~ -68-46~ -18
High Temp Range °F400 ~450400 ~500400~500
High Temp Range °C204~232204~260200~260
Heat Aging at 212°F (100°C)ExcellentExcellentExcellent
Steam ResistanceFairFair-GoodPoor-Good
Flame ResistanceExcellentFair- ExcellentGood- Excellent
Weather ResistanceExcellentExcellentExcellent
Sunlight ResistanceExcellentExcellentGood- Excellent
Ozone ResistanceExcellentExcellentExcellent
Radiation ResistanceFair- ExcellentPoor-GoodFair-Good
Oxidization Resistance (AIR)ExcellentExcellentExcellent
Water ResistanceExcellentExcellentExcellent
Gas Permeability RatingPoor-GoodPoor-FairGood- Excellent
Taste RetentionGoodGood- ExcellentFair-Good
Adhesion to MetalsGood- ExcellentGood- ExcellentGood- Excellent
ColorabilityGood- ExcellentExcellentGood- Excellent
Resilience or Rebound RatingExcellentGood- ExcellentFair- Excellent
Vibration DampeningGoodFair-GoodFair-Good
Flex Cracking ResistancePoor-GoodPoor-GoodGood
Tear ResistancePoor- ExcellentPoor-GoodFair-Good
Abrasion ResistancePoorPoor-GoodGood
Vacuum Weight LossExcellentExcellentExcellent
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