Heat, Fuel, and Bonding – One Compound Family That Handles It All: IOTA FHTV 3502
When your application calls for a material that not only resists harsh chemicals but also adheres reliably to metal inserts or reinforcement fabrics, the IOTA FHTV 3502 series adhesive fluorosilicone rubber is the answer. These compounds are specifically formulated for injection and transfer molding, delivering strong adhesion to substrates when paired with appropriate primers – a feature that simplifies overmolding and insert molding processes, reduces leakage paths, and enhances part integrity.
Available in three carefully selected hardness levels – 52, 61, and 69 Shore A – the FHTV 3502 range allows designers to choose the right balance between flexibility and structural support. All variants demonstrate excellent fuel and solvent resistance, highlighted by low volume swell in Fuel C (21–22%), which ensures dimensional stability and consistent sealing performance in constant contact with gasoline, oils, and polar solvents. Additionally, the low compression set (7–10% after 22 hours at 177°C) means these O-rings, gaskets, and custom-molded parts retain their original shape and sealing pressure over extended service intervals – reducing maintenance frequency and downtime.
Thermal endurance is equally impressive. After 72 hours of aging at 225°C, hardness shifts are minimal (≤3 points), and the retention of tensile strength and elongation remains well within acceptable limits for high-temperature under-hood and aerospace environments. When enhanced heat stability is required, the formulation readily accepts thermal additives without compromising its bonding or processing characteristics.
From a production standpoint, the IOTA FHTV 3502 series offers excellent processability. The recommended peroxide (double-25) loading range of 0.4–0.7 parts is forgiving, and the suggested cure schedule – 170°C/15 min primary plus 200°C/4 h post-cure – yields consistent physical properties across batches. Packaged in sturdy 20 kg cartons and stable for 12 months under proper storage, this product line is both practical and performance-driven. Whether you are manufacturing fuel system seals, aerospace connectors, or industrial diaphragms, the IOTA FHTV 3502 series gives you adhesion, resilience, and chemical resistance – all in one reliable compound.