Conquer Fuel, Heat, and Time – IOTA FHTV 3502 Adhesive Fluorosilicone Compound
In the race to build lighter, more efficient engines and fluid-handling systems, sealing materials must survive aggressive media, wide temperature swings, and constant mechanical stress – all while staying firmly attached to metal or composite housings. The IOTA FHTV 3502 series is purpose-built for this challenge: a flame-retardant-free, adhesive-capable fluorosilicone compound that bonds to primed substrates and delivers outstanding resistance to Fuel C, hot air aging, and compression creep.
Let’s examine the numbers that matter most. After 72 hours in Fuel C at room temperature, volume increase is a modest 21–22% – well within acceptable limits for most fuel-exposed gaskets. More impressively, after 72 hours at 225°C, hardness rises by only 2 to 3 points, tensile strength decreases by 21–24%, and elongation drops by 17–21%. These changes indicate excellent thermal stability, especially for a peroxide-cured silicone-based material. With the addition of a dedicated heat-stabilizer, the compound can even push beyond these ratings for short-term excursions.
The adhesive property is a game-changer. Unlike conventional fluorosilicones that rely purely on mechanical interference fits, the IOTA FHTV 3502 series, when used with the recommended primer, chemically anchors to steel, aluminum, and aramid fabrics. This creates a permanent bond that resists delamination under pressure pulsations and thermal shocks – a critical advantage for oil pan gaskets, turbocharger hose connectors, and aerospace fuel pump seals.
Processing is optimized for modern manufacturing: the compound flows well in injection molding, fills complex cavities without voids, and cures rapidly with 0.4–0.7 phr of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. A typical cycle is 170°C × 15 minutes, followed by a 200°C × 4-hour post-cure to achieve full property development. The product is shipped in 20 kg moisture-resistant cartons and should be stored in a cool, dry area – shelf life is guaranteed for 12 months. When your project demands a material that bonds, seals, and survives, specify IOTA FHTV 3502. It’s not just rubber; it’s engineered resilience.