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High resistance to aggressive automotive fluids including modern low-SAPS engine oils and biofuels.
Excellent high-temperature stability up to 230 °C short-term and sustained performance at 200 °C.
Low compression set retention after prolonged thermal aging, ensuring reliable sealing over extended service life.
Good processability in standard rubber compounding and molding equipment, supporting efficient production.
Enhanced resistance to hydrolysis and steam exposure compared to conventional FKM grades.
Dynamic and static seals in advanced internal combustion engines (e.g., turbocharger gaskets, valve stem seals).
Fuel system components exposed to ethanol-blended gasoline, biodiesel, and synthetic lubricants.
Under-hood automotive sensors and actuators requiring long-term thermal and chemical resilience.
Sealing solutions for industrial fluid handling systems operating with hot oils, solvents, and aggressive chemicals.
O-rings and molded parts in aerospace hydraulic and fuel subsystems meeting stringent OEM specifications.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Unvulcanized gum stock in bale form |
| Appearance | Light tan to amber-colored solid rubber |
| Primary Applications | High-performance static and dynamic sealing in automotive, aerospace, and industrial sectors |
| Key Features | High heat resistance, broad chemical resistance, low compression set, excellent processability |
| Benefits | Extended service life in harsh environments, reduced maintenance frequency, compatibility with modern low-emission fluid formulations |
| Standard Compliance | Meets ASTM D1418 classification: FKM; ISO 1629 designation: FKM |
Q1: What distinguishes Tecnoflon VPL 85540 from other FKM elastomers?
A: Tecnoflon VPL 85540 is a low-viscosity, peroxide-curable fluoroelastomer designed for enhanced processability in high-precision molding and extrusion. Its unique viscosity profile enables improved flow into complex geometries while maintaining excellent resistance to aggressive chemicals, high temperatures, and automotive fluids.
Q2: Is Tecnoflon VPL 85540 suitable for automotive fuel system applications?
A: Yes — it is widely specified for static and dynamic sealing components in modern fuel systems, including those exposed to biofuels, ethanol-blended gasoline, and advanced engine oils. Its fluorine content and optimized polymer architecture provide superior resistance to swelling and degradation under these demanding conditions.
Q3: What curing systems are recommended for Tecnoflon VPL 85540?
A: This grade is specifically formulated for peroxide-based cure systems, which deliver optimal thermal stability and compression set resistance. While alternative curatives may be evaluated, peroxide curing is strongly recommended to fully realize its performance potential in high-temperature service environments.
Q4: How does Tecnoflon VPL 85540 perform in contact with lithium-ion battery electrolytes?
A: It demonstrates significantly improved compatibility compared to conventional FKMs when exposed to carbonate-based electrolytes and lithium salts. While long-term aging data should be verified for specific cell designs, it is increasingly selected for seals and gaskets in battery module housings and thermal management systems.
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E-mail: wangxingqiang@ericwchem.com
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