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High fluorine content (≈68 wt%) for exceptional resistance to aggressive chemicals and hydrocarbons.
Optimized for low-temperature flexibility with a glass transition temperature (Tg) of approximately –18 °C.
Excellent compression set resistance after prolonged exposure to elevated temperatures up to 200 °C.
Good processability in standard rubber compounding and molding equipment, including injection and transfer molding.
Halogen-free formulation compatible with stringent environmental and regulatory requirements (e.g., REACH, RoHS).
Aerospace fuel system seals and diaphragms exposed to jet fuels and synthetic lubricants.
Automotive turbocharger hoses and valve stem seals operating under high-temperature exhaust conditions.
Chemical processing gaskets and O-rings handling concentrated acids, solvents, and amine-based media.
Oil & gas downhole elastomeric components requiring stability in sour gas (H₂S/CO₂) environments.
Pharmaceutical and biotech single-use fluid path connectors demanding extractables control and autoclave compatibility.
| Chemical Type | Fluoroelastomer (FKM), vinylidene fluoride–hexafluoropropylene–tetrafluoroethylene terpolymer |
| Product Form | Pellets (free-flowing, pre-compounded base polymer) |
| Appearance | Off-white to light tan, uniform cylindrical pellets |
| Primary Applications | High-performance static and dynamic seals, diaphragms, and molded parts |
| Key Features | Low-temperature flexibility, chemical inertness, thermal stability, low compression set |
| Benefits | Extended service life in harsh environments, reduced maintenance frequency, compliance with industry standards |
| Processing Guidance | Recommended for two-roll mill, internal mixer, and injection molding; requires high-temperature vulcanization |
Q1: What distinguishes Tecnoflon PL 958 from other FKM elastomers in Solvay’s portfolio?
A: Tecnoflon PL 958 is a peroxide-curable, low-viscosity fluoroelastomer specifically designed for high-precision compression and injection molding of thin-walled or geometrically complex parts. Its optimized rheology and clean scorch profile support excellent processability and surface finish, particularly in demanding sealing applications requiring tight tolerances.
Q2: Is Tecnoflon PL 958 suitable for contact with aggressive chemicals commonly found in automotive or chemical processing environments?
A: Yes — as an FKM-grade fluoroelastomer, Tecnoflon PL 958 offers outstanding resistance to hydrocarbons, oils, fuels, and many polar solvents across elevated temperature ranges. It maintains reliable performance in dynamic sealing applications exposed to modern low-sulfur diesel, biofuels, and aggressive process media, though compatibility should always be verified under actual service conditions.
Q3: What are the recommended curing systems for Tecnoflon PL 958?
A: Tecnoflon PL 958 is formulated for peroxide-based cure systems, which deliver optimal thermal stability and compression set resistance. Bisphenol-cure systems are generally not recommended due to its specific polymer architecture. Optimal peroxide selection and co-agent dosage depend on part geometry, production cycle time, and final property requirements.
Q4: Can Tecnoflon PL 958 be used in applications requiring FDA compliance for indirect food contact?
A: Tecnoflon PL 958 is not pre-certified for food-contact applications. While certain formulations using this grade may meet relevant regulatory expectations when compounded with FDA-compliant ingredients and processed under controlled conditions, end-use compliance must be established by the compounder or finished part manufacturer through full formulation evaluation and appropriate testing.
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