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Exceptional resistance to aggressive chemicals, including hydrocarbons, chlorinated solvents, and strong acids.
High thermal stability with continuous service capability up to 200 °C.
Excellent compression set resistance after prolonged exposure to elevated temperatures.
Low surface energy and non-stick characteristics suitable for demanding release applications.
Platinum-cured formulation enabling rapid, consistent vulcanization with precise control over cure kinetics.
Fuel system components in aerospace and high-performance automotive engines.
Seals and gaskets for chemical processing equipment handling corrosive media.
Valve seats and diaphragms in pharmaceutical and bioprocess fluid handling systems.
Extruded or molded tubing for semiconductor manufacturing tooling and ultra-pure fluid transfer.
Dynamic sealing elements in oil & gas downhole tools exposed to sour gas and hydrocarbon-rich environments.
| Chemical Type | Fluoro-substituted liquid silicone rubber (LSR) |
| Product Form | Two-part platinum-catalyzed liquid system (Part A + Part B) |
| Appearance | Translucent, low-viscosity liquid (Part A); translucent liquid catalyst (Part B) |
| Primary Applications | High-performance static and dynamic seals, gaskets, tubing, and molded components |
| Key Features | Fluorine-modified backbone, heat-resistant, chemically inert, low compression set |
| Benefits | Extended service life in harsh chemical/thermal environments, reduced maintenance, regulatory compliance for critical industries |
| Cure System | Pt-catalyzed addition cure (hydrosilylation) |
| Shelf Life (Unopened, 25 °C) | 12 months from date of manufacture |
Q1: What are the key performance advantages of Dow SILASTIC FL 45-9001 compared to standard liquid silicone rubbers?
A: Dow SILASTIC FL 45-9001 offers significantly enhanced resistance to aggressive chemicals—including fuels, oils, solvents, and polar media—due to its fluorinated backbone. It also maintains excellent thermal stability and low compression set over extended service life, making it suitable for demanding sealing and dynamic gasketing applications where conventional LSRs may degrade.
Q2: Is FL 45-9001 compatible with standard platinum-cure LSR processing equipment and tooling?
A: Yes, FL 45-9001 is formulated for compatibility with conventional liquid injection molding (LIM) systems used for platinum-cure silicones. It exhibits good flow characteristics and cure kinetics similar to many high-performance LSRs, though optimal cycle times and mold temperature profiles should be confirmed during process validation for each specific part geometry and production setup.
Q3: Can FL 45-9001 be overmolded onto thermoplastics or other elastomers?
A: FL 45-9001 can be successfully overmolded onto many engineering thermoplastics (e.g., PBT, PPA, and certain polyamides) and select thermoplastic elastomers, provided surface energy, thermal compatibility, and interfacial adhesion are addressed through appropriate mold design, process tuning, and optional surface pretreatment. Bond strength is formulation- and process-dependent and should be evaluated empirically for each substrate combination.
Q4: Does FL 45-9001 require special handling or storage conditions?
A: Like other platinum-cure LSRs, FL 45-9001 must be protected from contamination by sulfur-, nitrogen-, phosphorus-, and tin-containing compounds, which can inhibit cure. It should be stored in original sealed containers at cool, dry conditions (typically below 30 °C), away from direct sunlight and sources of volatile inhibitors. Shelf life is maintained when stored properly, but viscosity and reactivity should be verified prior to use after extended storage.
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