When a seal fails in fuel service, the review usually starts with the compound — hardness, curing, filler. But the root of many problems sits one step earlier: the gum the compound was built on.

IOTA 3110F is a fluorosilicone gum designed as the base polymer for heat-vulcanized, fuel-resistant fluoro silicone rubber.

1. Why Does the Gum Choice Matter?

The base polymer defines the ceiling of the compound:

• Fuel and solvent resistance comes from the trifluoropropyl groups in the polymer chain.

• Temperature range comes from the siloxane backbone.

• Crosslink density is controlled by vinyl functionality.

No filler package can fully compensate for a gum that does not match the application.

2. What Is IOTA 3110?

IOTA 3110F is a high-molecular-weight polymethyltrifluoropropylsiloxane with vinyl groups in side and end positions — a fluorosilicone base rubber combining the temperature resistance of silicone rubber with the fuel and solvent resistance of fluororubber.

Its published product information includes:

Special models can be customized. These are typical values, not guaranteed specifications for the finished compound.

3. Where Is It Used?

IOTA 3110F serves as the base for heat-vulcanized (HTV) fluoro silicone rubber, processed into products for:

• Military and aviation industry components.

• Automotive fuel-system seals and diaphragms.

• Petrochemical sealing exposed to fuels, oils and solvents.

• Selected medical healthcare applications.

4. How Should You Select the Grade?

Three parameters drive the choice:

Vinyl content (0.1 / 0.3 / 1.0 mol%). Higher vinyl content increases crosslink density and influences compression set and elongation of the cured compound.

Molecular weight / Mooney viscosity. Affects mixing behavior, filler incorporation and the flow of the compound during molding.

Volatility. Low volatiles (< 2%) reduce porosity and weight loss during vulcanization.

Match these against the compound specification — hardness, elongation, compression set — before running trials.

5. How Should You Evaluate It?

1. Define the working media, temperature range and target hardness of the finished part.

1. Compound MY 110F with your standard filler and curing system.

1. Compare vulcanizate properties against your current compound: fuel swell, compression set, tensile and elongation.

1. Optimize the formulation based on which gum grade performed closest to target.

FAQ

1. Is IOTA 3110F a finished compound?

No. It is the base gum for compounding heat-vulcanized fluoro silicone rubber.

2. Why is vinyl content offered in three levels?

Vinyl content tunes crosslink density — and with it elongation, compression set and curing behavior of the compound.

3. What industries is it intended for?

Military, aviation, automotive, petrochemical and medical healthcare applications.

4. What should buyers provide when requesting a sample?

Target compound properties, working media, temperature range and processing method.

Related Product

Product page: Fluoro Silicone Gum IOTA 3110F

Contact the IOTA team with your application requirements to discuss the next steps for material evaluation.