Fluorosilicate Rubber (FVMQ) Sheet

Material Composition & Chemical Structure

Fluorosilicone Rubber (FVMQ) is a sophisticated high-performance elastomer. Its molecular backbone is based on a siloxane chain (Si-O), which it inherits from silicone rubber, providing inherent flexibility and high-temperature stability.

The critical enhancement lies in the side groups attached to this chain. While standard silicone rubber has methyl groups (-CH₃), Fluorosilicone has a significant portion of these replaced by fluoralkyl groups, typically trifluoropropyl groups (-CH₂-CF₃). This incorporation of fluorine is the key to its unique property set. The strong carbon-fluorine bonds in the side groups create a dense, chemically inert shield around the siloxane backbone, dramatically improving resistance to hydrocarbons, fuels, oils, and solvents.

We offer two standard hardness grades to meet your specific application needs:



Key Advantages: A Balanced Solution

This hybrid chemical structure gives Fluorosilicone rubber a distinct advantage. It effectively solves the key weaknesses of both silicone and fluorocarbon rubbers. It overcomes the poor resistance of standard silicone rubber to corrosive chemicals, oils, and fuels, while also solving the major shortcoming of Fluorocarbon Rubber (FKM)—its poor low-temperature performance. 

Excellent Fuel, Oil & Chemical Resistance: Superior to silicone, offering excellent resistance to non-polar solvents, fuels, oils, and many chemicals.

Wide Service Temperature Range: It operates effectively from approximately -60°C to 230°C (-76°F to 446°F), bridging the gap between silicone's low-temperature flexibility and FKM's high-temperature endurance.

Weather, Ozone & UV Resistance: Excellent resistance, ensuring long-term performance outdoors.

Good Compression Set: Performs reliably under prolonged compression.

Disadvantages

Moderate Mechanical Properties: Tensile and tear strength are generally lower than those of FKM.

Unsuitable for Specific Chemicals: Not recommended for use with brake fluids, ketones, and strong polar solvents.

Moderate Resistance to High-Pressure Steam: A key limitation is its moderate resistance to high-temperature steam. Its properties can degrade rapidly in the presence of high-pressure saturated steam above approximately 120°C.