IOTA FLSR3400 Series – Liquid Fluorosilicone Rubber That Redefines Performance Under Extreme Conditions

When your application demands unwavering resilience against fuels, solvents, and temperature extremes, the IOTA FLSR3400 Series liquid fluorosilicone rubber delivers engineering-grade confidence. Designed around a platinum-catalyzed addition-cure system, this two-component (A:B = 1:1) material combines a vinyl-terminated polyfluorosiloxane base with a hydride-functional crosslinker, creating a high-strength, fast-injection-moldable elastomer that cures with exceptional precision.
Why engineers choose FLSR3430 / 3440 / 3460:
Versatile hardness range – from 28 to 62 Shore A (after post-cure), covering soft-damping to tougher sealing applications.
High tensile strength – up to 10.5 MPa, with tear strength sustained at 12–13 kN/m across all grades, ensuring durable dynamic seals and gaskets.
Low compression set – after post-cure at 200°C for 4 hours, values drop to as low as 5% (FLSR3430/3440) and 7% (FLSR3460), proving long-term sealing reliability in high-temperature service.
Outstanding fluid resistance – volume swell in IRM903 oil (150°C×168h) is only 3%, while Fuel C and FAM B swells are 23% and 29% respectively – far lower than conventional silicone rubbers.
The processing window is equally impressive: inject at 120°C for 10 minutes for a rapid first-stage cure, then post-cure at 200°C×4h to unlock full mechanical and compression-set properties. With viscosities ranging from 410 to 820 Pa·s (B-side), the series flows smoothly into complex mold geometries, reducing cycle times and scrap rates.
Packaged in 20 kg cartons and stable for 12 months in cool, dry storage, the IOTA FLSR3400 Series is your direct path to reliable automotive, aerospace, and industrial sealing solutions. Avoid contact with nitrogen-, sulfur-, phosphorus-, or heavy-metal-containing compounds to maintain batch-to-batch consistency.
Choose IOTA – where fluorosilicone innovation meets real-world durability.