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Excellent resistance to aggressive automotive fluids including modern low-sulfur diesel, biofuels, and advanced engine oils.
Outstanding high-temperature performance with continuous service capability up to 200 °C.
Low compression set retention for reliable sealing integrity over extended service life.
Good processability in standard rubber compounding and molding equipment.
Enhanced resistance to hydrolysis compared to conventional FKM grades.
Fuel system seals and gaskets in internal combustion engines.
Turbocharger hose linings and sealing components.
Valve stem seals and crankcase ventilation system parts.
High-temperature O-rings and diaphragms in emission control systems.
Seals for hybrid powertrain components exposed to mixed fluid environments.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Uncured elastomer compound in bale form |
| Appearance | Black, homogeneous solid bale |
| Primary Applications | High-performance static and dynamic seals in automotive powertrain systems |
| Key Features | Fluid resistance, thermal stability, low compression set, hydrolysis resistance |
| Benefits | Extended component lifetime, reduced maintenance, compliance with OEM fluid compatibility requirements |
| Curing System | Standard bisphenol-cured formulation |
| Density (ASTM D297) | ~1.86 g/cm³ |
Q1: What distinguishes Tecnoflon FOR 5312K from other FKM elastomers in the Tecnoflon portfolio?
A: Tecnoflon FOR 5312K is a specialty fluoroelastomer formulated with a balanced composition of vinylidene fluoride (VDF), hexafluoropropylene (HFP), and tetrafluoroethylene (TFE), optimized for enhanced resistance to aggressive polar solvents, low-temperature flexibility, and improved processability in high-precision molding applications—particularly where consistent compression set performance is critical.
Q2: Is Tecnoflon FOR 5312K suitable for dynamic sealing applications in automotive fuel systems?
A: Yes—its formulation provides excellent resistance to modern fuel blends, including those containing biofuels and oxygenated additives, as well as good resilience under repeated flexing. It is commonly selected for fuel rails, injector O-rings, and high-pressure common rail components where long-term dimensional stability and low compression set are required.
Q3: How does the processing behavior of FOR 5312K compare to standard peroxide-cured FKMs?
A: FOR 5312K is designed for efficient peroxide curing and exhibits lower Mooney viscosity than many conventional FKMs, supporting better flow into complex mold geometries and reduced scorch sensitivity during extrusion or injection molding—enabling higher throughput and improved surface finish in precision-engineered parts.
Q4: Can FOR 5312K be used in contact with food-grade or pharmaceutical processing fluids?
A: While not pre-certified for direct food or pharmaceutical contact, FOR 5312K is compatible with standard FDA-compliant peroxide cure systems and can be formulated to meet relevant regulatory expectations for elastomeric components in such environments—subject to final validation by the compounder and end-user under applicable jurisdictional requirements.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
