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Fluorosilicone Lined Hoses (FSH / FVMQ / Fuel Resistant Hoses)

Fluorosilicone lined hoses are designed for applications requiring resistance to fuel, oil, and vapours, while maintaining the flexibility and high-temperature performance of silicone.

Featuring a fluorosilicone (FVMQ) inner liner with a reinforced silicone outer layer, these hoses are ideal for environments where standard silicone hoses would degrade due to exposure to hydrocarbons.

  • Excellent resistance to fuel, oil and vapours
  • High temperature and pressure performance
  • Flexible and durable construction
  • Ideal for automotive, marine and industrial applications

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What are Fluorosilicone Lined Hoses?

Fluorosilicone lined hoses (FSH hoses) are specialist silicone hoses that incorporate a fluorosilicone (FVMQ) inner lining, providing enhanced resistance to fuel, oil, and hydrocarbon vapours.

The outer layer is typically constructed from reinforced silicone (VMQ), combining:

  • Chemical resistance internally
  • Strength and flexibility externally

This makes FSH hoses ideal for fuel and oil-related applications, where standard silicone hoses are not suitable.

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  • Known As

    • FVMQ hoses
    • Fuel resistant silicone hose
    • Oil resistant silicone hose
    • FSH hoses
    • Fuel vapour hose

  • Key Features and Benefits

    Fuel & Oil Resistance – Fluorosilicone lining provides excellent resistance to petrol, diesel, oils, and hydrocarbon vapours.

    Vapour Permeation Resistance – Reduces fuel vapour loss, helping improve system efficiency and meet performance requirements.

    High Temperature Capability – Typically operates between -50°C and +200°C, depending on construction and application.

    Flexible and Durable – Maintains flexibility across a wide temperature range, reducing the risk of cracking or failure.

    Reinforced Construction – Multi-ply reinforcement provides strength under pressure and long-term reliability.

  • What FSH Hoses Are Used For

    Fluorosilicone lined hoses are used in applications where fuel and vapour resistance is essential:

    • Automotive fuel and emission systems
    • Turbocharger and intake systems
    • Commercial vehicles and heavy-duty fleets
    • Marine fuel and oil systems
    • Industrial machinery and equipment
    • Performance and motorsport applications

  • Sizes, Lengths, Angles

    • Inner diameters (ID): From 6mm to 152mm
    • Straight: Available as standard in 1, 2, 3 and 4 metre lengths. Other lengths can be requested.
    • Elbows: 45°, 90°, 135°, 180° with leg lengths from 102mm to 250mm. Bespoke parts also available.
    • External colours: Full range of colours available upon request.

Why Fluorosilicone Hoses Are Required

Standard silicone hoses (VMQ) offer excellent temperature resistance but are not resistant to hydrocarbons, which can lead to:

  • Material degradation
  • Swelling or softening
  • Permeation of fuel vapours

Fluorosilicone lined hoses are specifically engineered to:

  • Resist fuel, oil, and vapour exposure
  • Prevent permeation and system contamination
  • Maintain performance under high temperature and pressure conditions

This makes them essential for modern systems where fuel compatibility and durability are critical.

Leyland Hose & Silicone Fluorosilicone Capability

At Leyland Hose & Silicone, our fluorosilicone lined hoses are:

  • Manufactured using high-quality FVMQ liners
  • Reinforced for strength and durability
  • Designed for fuel, oil, and vapour resistance
  • Available in standard and bespoke configurations

Our hoses deliver reliable performance in demanding environments, where chemical resistance and durability are critical.c

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