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High resistance to aggressive automotive fluids including modern low-viscosity engine oils, transmission fluids, and biofuels (e.g., E85, B20).
Excellent high-temperature performance with continuous service capability up to 200 °C and short-term resistance to 230 °C.
Outstanding compression set resistance—critical for dynamic sealing applications requiring long-term reliability.
Low-temperature flexibility down to –15 °C, maintaining effective sealing integrity in cold-start conditions.
Good processability on standard rubber processing equipment, including extrusion and injection molding.
Engine valve stem seals and turbocharger hose couplings in high-performance gasoline and diesel powertrains.
Transmission system seals, including clutch piston seals and solenoid valve diaphragms.
Fuel system components such as fuel injector O-rings and fuel rail gaskets exposed to ethanol-blended fuels.
Under-hood fluid handling seals in hybrid and electric vehicle thermal management systems.
Industrial hydraulic and pneumatic seals operating in demanding chemical environments.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Uncured gum stock (sheet or bale) |
| Appearance | Light tan to amber, homogeneous elastomeric sheet |
| Primary Applications | Dynamic and static seals in automotive powertrain and fluid systems |
| Key Features | High heat resistance, low compression set, excellent fluid resistance |
| Benefits | Extended service life, reduced leakage risk, compatibility with next-generation fuels |
| Cure System Compatibility | Standard diamine-cured formulations; optimized for peroxide-free processing |
| Density (ASTM D297) | ~1.92 g/cm³ |
Q1: What distinguishes Tecnoflon VPL 45535 from other FKM elastomers in terms of processing and final part performance?
A: Tecnoflon VPL 45535 is a low-viscosity, peroxide-curable fluoroelastomer designed for enhanced processability—especially in high-precision injection molding and extrusion—while retaining excellent resistance to aggressive chemicals, high temperatures, and compression set. Its optimized molecular structure supports faster cure cycles and improved flow into complex geometries without sacrificing long-term thermal or fluid resistance.
Q2: Is Tecnoflon VPL 45535 suitable for applications requiring FDA compliance or food-contact approval?
A: Tecnoflon VPL 45535 is formulated without intentionally added heavy metals or prohibited plasticizers and is commonly used in food-processing equipment seals and pharmaceutical system components. While the base polymer meets general regulatory expectations for elastomeric materials in indirect food contact, final compliance depends on the complete cured compound formulation and must be verified by the compounder against applicable regional requirements.
Q3: How does this grade perform in dynamic sealing applications exposed to hot oils and automotive fluids?
A: As a high-fluorine-content FKM with optimized crosslink density, Tecnoflon VPL 45535 delivers outstanding resistance to swelling and degradation when exposed to modern synthetic engine oils, transmission fluids, and brake fluids—even at elevated service temperatures up to 200 °C. Its low compression set ensures reliable sealing force retention under prolonged dynamic loading.
Q4: What are the recommended curing systems and typical scorch safety considerations?
A: Tecnoflon VPL 45535 is specifically engineered for peroxide-based cure systems, offering good scorch safety during processing while enabling efficient, uniform crosslinking. Bisphenol-cure systems are generally not recommended. Optimal peroxide selection and activator levels should be determined empirically based on compound design, equipment, and production cycle requirements.
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