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High thermal stability with continuous service capability up to 200 °C in air.
Excellent resistance to aggressive automotive fluids, including modern low-SAPS engine oils and transmission fluids.
Outstanding resistance to oxidation, ozone, and weathering without requiring additional antiozonants.
Good compression set resistance at elevated temperatures, ensuring long-term sealing performance.
Optimized for dynamic sealing applications requiring balanced mechanical strength and elastomeric recovery.
Automotive fuel systems: high-pressure fuel injectors and rail seals.
Engine timing components: camshaft and crankshaft oil seals.
Transmission and powertrain systems: clutch piston seals and valve body gaskets.
Industrial hydraulic systems operating with HFD-U synthetic fire-resistant fluids.
Aerospace fluid handling: hydraulic actuators and fuel system O-rings.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Unvulcanized gum stock in bale form |
| Appearance | Light tan to pale yellow, homogeneous sheet or block |
| Primary Applications | Dynamic and static seals in high-temperature, chemically aggressive environments |
| Key Features | Low compression set, high heat resistance, excellent fluid compatibility |
| Processing Method | Conventional rubber processing: mixing, extrusion, calendering, and compression molding |
| Curing System | Requires bisphenol-based or peroxide cure systems (formulation-dependent) |
| Standards Compliance | Meets ASTM D1418 classification FKM; compliant with SAE J200/ISO 1629 designation FKM |
Q1: What is the primary chemical resistance profile of Syndial Tecnoflon FOR 5351/U?
A: Syndial Tecnoflon FOR 5351/U is a fluorocarbon elastomer (FKM) specifically formulated for enhanced resistance to aggressive hydrocarbons, aromatic solvents, and high-temperature oils. It maintains excellent integrity in contact with fuels, lubricants, and many industrial chemicals commonly encountered in demanding sealing applications.
Q2: Is this grade suitable for dynamic sealing applications?
A: Yes — FOR 5351/U is designed with balanced compression set resistance and low-temperature flexibility, making it well-suited for both static and moderately dynamic sealing environments, including valve stems, pump shafts, and reciprocating seals where thermal and chemical stability are critical.
Q3: How does FOR 5351/U differ from standard peroxide-cured FKM grades?
A: Unlike conventional peroxide-cured FKMs, FOR 5351/U utilizes a proprietary curing system that delivers improved scorch safety during processing and enhanced consistency in high-precision molded parts — particularly beneficial for complex geometries and tight-tolerance applications.
Q4: Can this elastomer be used in food-contact or pharmaceutical processing equipment?
A: While not pre-certified for direct food contact, FOR 5351/U is manufactured using raw materials compliant with general FDA guidelines for indirect food contact (21 CFR §177.2600), and may be considered for use in gaskets, diaphragms, and seals within food and pharma processing systems — subject to final validation by the end-user and regulatory approval of the finished component.
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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
