Unlock Superior Bonding Performance with IOTA FHTV 3502 Series – The Reliable Choice for Demanding Sealing Applications
In industries where extreme conditions are the norm, your sealing materials must perform flawlessly – not just in resistance, but in adhesion. The IOTA FHTV 3502 Series adhesive fluorosilicone rubber compounds are engineered to meet that challenge head-on. Designed for both injection and compression molding, these compounds bond exceptionally well to metals and aramid fabrics when used with appropriate primers, opening up new possibilities for composite and hybrid part designs.
What sets the FHTV 3502 series apart is its balanced property profile across three hardness grades – FHTV3552 (52 Shore A), FHTV3562 (61 Shore A), and FHTV3572 (69 Shore A). All grades deliver impressive tensile strengths above 9 MPa and tear strengths up to 18 kN/m, ensuring durable performance under mechanical stress. More importantly, these materials exhibit outstanding fluid resistance, with Fuel C volume swell rates of only 21–22% after 72 hours at 23°C, making them ideal for fuel system components, aerospace seals, and automotive gaskets that frequently contact aggressive solvents and oils.
Compression set is another critical metric for long-term sealing reliability, and the FHTV 3502 series excels here too – with values as low as 7% (at 177°C for 22 hours), these compounds maintain their sealing force even after prolonged thermal cycling. Their resilience (31–35% rebound) further supports dynamic sealing applications. For high-temperature environments, the compounds show stable aging behavior at 225°C for 72 hours, with hardness increases of only 2–3 points and moderate changes in tensile and elongation – a clear sign of robust thermal stability.
Processing is straightforward: simply add 0.4–0.7 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (double-25 peroxide), cure at 170°C for 15 minutes (primary), followed by a post-cure at 200°C for 4 hours. With a 12-month shelf life in cool, dry storage and available in 20 kg cartons, the IOTA FHTV 3502 series combines practicality with high-end performance. If you are looking for a bondable fluorosilicone that reduces assembly complexity while withstanding fuel, heat, and compression – this is your solution.