Overview
Fluorosilicone solid round strip is a specialized elastomer product made from fluorosilicone rubber (FVMQ), a material that combines silicone's flexibility with fluorine's chemical resistance. These extruded profiles are commonly used as sealing components in demanding environments where standard silicones fail. Unlike basic silicone rubbers, fluorosilicone exhibits exceptional stability when exposed to fuels, oils, and extreme temperatures. The solid round strip form factor makes it ideal for creating custom gaskets, O-ring replacements, and dynamic seals in industrial and transportation applications.
Physical and Chemical Properties
Fluorosilicone strips maintain elasticity across a wide temperature range (-50°C to +200°C continuous service) with intermittent peaks up to 250°C possible. The material's fluorine content provides outstanding resistance to hydrocarbons, including jet fuels, diesel, and hydraulic fluids, where swelling is limited to <10%. Typical hardness ranges from 50 to 80 Shore A, with tensile strength of 5–10 MPa. The material demonstrates low gas permeability and excellent weathering/UV resistance compared to conventional rubbers. Electrical properties include volume resistivity of 10^12–10^14 ohm·cm and dielectric strength of 15–25 kV/mm.
Main Applications
In automotive systems, these strips serve as fuel injector seals, transmission gaskets, and EV battery cooling system components where hydrocarbon exposure occurs. Aerospace applications include aircraft fuel tank seals and engine compartment gaskets that must withstand both jet fuel and wide temperature swings. The chemical processing industry utilizes fluorosilicone strips for pump seals and valve stem packing in corrosive environments. Medical device manufacturers employ medical-grade versions for fluid handling systems due to the material's biocompatibility and sterilization resistance.
Safety and Storage
While cured fluorosilicone is chemically inert, uncured material may contain volatile components requiring proper ventilation during processing. Finished products are generally ROHS and REACH compliant, with food-grade versions available for culinary equipment applications. Storage recommendations include keeping strips in original packaging at <30°C with <70% humidity. Avoid contact with sharp objects that could compromise surface integrity. Shelf life typically exceeds 5 years when stored properly, though material testing is advised for critical applications after prolonged storage.
B2B Procurement Guide
Industrial buyers should specify diameter tolerances (typically ±0.1mm for precision applications), durometer hardness (usually 60–75 Shore A for seals), and any required certifications (e.g., FDA, UL, or military specs). Custom formulations for improved compression set or low-temperature flexibility are available from specialty manufacturers. MOQs generally start at 100 meters for standard sizes (3–20mm diameter), with lead times of 2–6 weeks for custom formulations. For prototype development, many suppliers offer small-quantity CNC cutting services to create sample gaskets from purchased cord stock. Always request material test reports (MTRs) for critical applications.
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