Fluoroelastomer Precompound
Rubber Compounds
Fluorine Content: 66-70%
Form: Solid
Specific Gravity: 1.81
Thickness: 2-8mm
Compression Set: 17
Finished Product: Slab
Color: Off-white / Transparent
Solubility: Ketones and Esters
Mooney Viscosity ML 1 10@ 121℃: 20-90
Typical Applications: O-rings, gaskets, oil seals, fuel hoses, sundries, and other products.
Fluoroelastomer precompound is formulated using a copolymer or terpolymer of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene, together with curatives. It is designed for applications such as O-rings, seals, gaskets, calendered goods, and extruded tubing and hoses that require methanol resistance. FKM precompound also has high performance in manufacturing metal-bonded components, valve-stem seals, and other rubber parts with complex geometries.
| Product Code | Nominal Viscosity ML (1 10) | Specific Gravity (g/cm³) | Fluorine Content (%) | Tensile (MPa) | Elongation (%) | Hardness Shore A | Compression Set (%) 70h@200℃ | TR10 (℃) | Volume Change (Fuel C) | Typical Applications |
| F Series: Bisphenol Copolymer series. Miscellaneous applications with balanced performance and processing properties | ||||||||||
| 25 | 1.83 | 66 | 13 | 220 | 78 | 16 | -17 | 4.0% | O-rings, gaskets, injection molding components | |
| 30 | 1.83 | 66 | 14 | 220 | 77 | 17 | -17 | 3.9% | O-rings, gaskets, and some sealing parts that required low compression set | |
| 40 | 1.83 | 66 | 15 | 210 | 76 | 15 | -17 | 3.8% | O-rings, gaskets, and some FDA-standard sealing components | |
| 50 | 1.83 | 66 | 15.3 | 230 | 76 | 16 | -17 | 3.8% | O-rings, gaskets, and sealing components | |
| 60 | 1.83 | 66 | 16.2 | 220 | 77 | 13 | -17 | 3.5% | O-rings, gaskets, and some sealing components that required low compression set | |
| 90 | 1.83 | 66 | 17.8 | 240 | 77 | 11 | -17 | 3.5% | O-rings, gaskets, and compression molding components | |
| 32 | 1.82 | 66 | 14.5 | 250 | 77 | 20 | -17 | 3.7% | Valve stem oil seals, shaft seals, and parts with complicated geometries | |
| 40 | 1.83 | 66 | 15 | 230 | 75 | 19 | -17 | 4.0% | Valve stem oil seals, shaft seals, and parts with complicated geometries | |
| 55 | 1.83 | 66 | 15.7 | 260 | 78 | 21 | -17 | 4.0% | Oil seals, oil shaft seals, and some parts require a bonding property | |
| 40 | 1.83 | 66 | 14.3 | 250 | 75 | 18 | -17 | 4.0% | Rubber parts with complicated shapes, like valves and bellows | |
| 22 | 1.84 | 66 | 13 | 250 | 75 | 25 | -17 | 4.0% | Hose and other extrusion parts | |
| T and HT TL Series: Bisphenol Terpolymer series. Enhance resistance to heat & chemicals, combined with high resistance to compression set. | ||||||||||
| 40 | 1.85 | 68 | 14.5 | 240 | 78 | 28 | -13 | 3.0% | General purpose, O-rings, gaskets, and moulded parts | |
| 60 | 1.85 | 68 | 15.4 | 230 | 79 | 24 | -13 | 3.0% | General purpose, O-rings, gaskets, moulded parts | |
| 35 | 1.86 | 68 | 13.5 | 250 | 77 | 35 | -13 | 3.0% | General purpose, oil seals, shaft seals, valve seals, and parts that require bonding or adhesion | |
| 40 | 1.86 | 68 | 14.6 | 260 | 77 | 35 | -12 | 2.0% | General purpose, oil seals, shaft seals, valve seals, and parts that require bonding or adhesion | |
| 46 | 1.86 | 68 | 14.2 | 270 | 77 | 26 | -12 | 2.0% | General purpose, O-rings and gaskets, moulded parts | |
| 27 | 1.86 | 69 | 13.1 | 300 | 76 | 35 | -12 | 2.0% | Fuel hose that required bonding with ECO, like an extruded hose | |
| 50 | 1.89 | 70 | 14.8 | 250 | 79 | 39 | -9 | 1.2% | Rubber parts with complicated shapes | |
| 55 | 1.89 | 70 | 15.5 | 240 | 79 | 37 | -9 | 1.2% | Sealing components that required low fuel permeability | |
| 30 | 1.8 | 66 | 14 | 230 | 78 | 26 | -19 | 4.0% | General purpose, O-rings, gaskets, and extruded profiles | |
Used in engine seals and fuel hoses, providing resistance to high temperatures and exposure to fuels and lubricants. Helps maintain vehicle performance and reliability under demanding operating conditions.
Applied in reactor vessels, pumps, valves, and pipeline linings, offering resistance to strong acids, bases, and organic solvents. Enhances operational safety by preventing leaks and material degradation in chemical processing environments.
Used in aircraft engines, hydraulic systems, and fuel system seals, capable of withstanding high temperatures, pressure variations, and aggressive fluids. Contributes to the efficiency and durability of aerospace components.
Utilized in chip packaging and equipment seals, benefiting from chemical stability and low gas permeability. Helps protect electronic components and maintain manufacturing precision in semiconductor production.
Fluoroelastomer precompound is designed for applications that require chemical resistance, thermal stability, and reliable mechanical properties. Its formulation allows for customization based on processing and performance requirements, making it suitable for a wide range of industries.
- Chemical and Oil Resistance
Resistant to chemical corrosion, making it suitable for seals in pumps and equipment containers used in chemical processing. Helps prevent leaks and degradation when exposed to aggressive substances.
Performs well in oil-rich environments, resisting swelling and deterioration when in contact with petroleum-based and synthetic oils, lubricants, and fuels. It is commonly used in engine seals, transmission components, and valve seals where long-term oil resistance is required.
- Thermal Performance
Designed for long-term use in high-temperature environments, maintaining stable properties at 200°C and above. Certain grades can withstand short-term exposure to 250°C–300°C, making it one of the most heat-resistant elastomers available. This allows it to perform reliably in applications exposed to continuous heat and thermal cycling.
Performance at low temperatures is relatively limited, with elasticity retention typically ranging between -15°C and -20°C. As the temperature decreases, tensile strength increases, but reduced flexibility may lead to sealing challenges and potential leakage in extremely cold conditions.
- Low Gas Permeability
Its dense polymer structure minimizes gas transmission and leakage, making it suitable for vacuum systems, aerospace components, and other applications where maintaining an airtight seal is critical.
- Flame Resistance
Fluoroelastomer precompound has inherent flame-retardant properties, allowing it to self-extinguish when exposed to fire. This characteristic enhances safety in high-risk environments, reducing the risk of fire-related failures.
- Processability and Versatility
The precompounding process improves workability, making it suitable for compression molding, extrusion, and injection molding. Manufacturers can easily shape it into custom rubber components for diverse industrial applications, ensuring compatibility with different production requirements.
- Mechanical Properties
High tensile and tear strength ensure durability under continuous stress, reducing the risk of cracking or damage. This enhances the longevity and reliability of components used in demanding applications.
Moderate hardness, typically ranging from Shore A 70–80, provides a balance between rigidity and flexibility. This allows parts to maintain their shape and structural stability over extended use.
Excellent resistance to permanent deformation, enabling components to recover their original shape and dimensions after prolonged stress or compression. Low compression set helps maintain long-term sealing performance in gaskets and other sealing applications.
Fluoroelastomer precompounds are packaged in a carton box, weighing 25 kg per box. We provide options of 500 kg, 625 kg, and 700 kg per pallet for bulk shipping, sent through express delivery services such as FedEx, DHL, and others.