Fluorosilicone (FMVQ) and fluorocarbon (FKM) lined hoses, for fuel, oil and chemical resistance

Where oil, oil mist, fuel and or, certain chemicals may be present in turbo-charger and other air or exhaust gas systems, it is necessary to use a fluorosilicone or fluorocarbon liner in a silicone hose. Normal silicone is not resistant to oil which, swells the silicone and permeates through wall of the hose.

A Fluorosilicone or Fluorocarbon lining can also be used to protect against OAT coolants, certain aggressive rust inhibitors sometimes used in coolant systems bi-products from EGR systems and other chemicals.

Fluorosilicone, when used with an appropriate silicone compound and fabric reinforcement, offers good temperature stability from -55⁰C up to +230⁰C.

Fluorocarbon lined hoses offer slightly better high temperature stability however, are not as suited to use at extreme low temperatures. Fluorocarbon is more resistant to and is required where an acidic environment is a risk, including some EGR bi-products.

Leyland Hose & Silicone offer both types of hose. When producing FVMQ and FKM lined hoses, it is vital to use only the highest quality materials. Unlike some manufacturers who dilute the lining material to reduce cost, Leyland Hose & Silicone use only 100% pure material, guaranteeing the best possible resistance to oils and chemicals.

Any dilution of the liner material, potentially reduces the performance and resistance of the hose to oils and other chemicals.

By using only the highest quality materials, LHSS silicone hoses offer superior reliability even when operating under the extreme conditions found on modern Euro 6 engines. Our Turbo-charger and intake hoses are used by many OE vehicle manufacturers in Euro 5 and Euro 6 applications.


LHSS silicone hoses are specifically designed for use in the turbo-charger hot and cold side systems and coolant hose applications on Trucks, Buses, passenger cars, generators, railway engines and many other vehicle and industrial applications where resistance to fuel, oil, OAT coolants and various chemicals, is required.

Leyland Hose and silicone produce a wide range of straight sleeves, shaped non-convoluted hoses and convoluted hoses (bellows). Convoluted hoses are produced with both conventional cuffed ends or, with V-band connections. V-band clamp hoses are particularly useful where space limitations restrict fitting of the hose. They are ideal for joining pipes of similar or differing diameters – reducers, turbo chargers, intercoolers and air intake systems.

Fluorosilicone Hose


LHSS use high quality polyester, meta-aramid and woven glass fabrics, depending on the application requirements such as, temperature and flexibility.

All fabrics reinforcement used in LHSS silicone hoses, is of the highest quality, supplied by leading UK manufacturers.

Our standard range of hoses are made using 3, 4 or 5 plies of fabric depending on diameter, with wall thickness and construction dependent on service conditions and flexibility required. Our materials and specification are carefully chosen, to provide a hose which offer easy fitting combined with maximum performance.

Production and Technical options

Part marking including specific customer logo, part numbers and traceability options.

High temperature reflective sleeve, providing protection in specific vulnerable areas for example, close to turbo or exhaust systems.

Anti-abrasion sleeving. This can provide protection where a hose is likely to come in to contact with moving or, vibrating components.

Hose Clamps: Leyland Hose & Silicone recommend and can provide a range of clips, ideal for all hose clamping solutions.


Our dedicated factory is equipped with an extensive range of test equipment which, allows LHSS to monitor, maintain and provide materials and product to both customer and our own unique and demanding specifications.

All product used in our hose building process, is backed up with supplier certification. In addition at LHSS, we carry out our own in house testing to verify batch to batch consistency.

LHSS are able to carry out product testing. Our factory has the facilities to carry out burst pressure testing, heat ageing, vibration and flex testing and pressure cycle testing. Our multi-directional test rig allows Leyland Hose & Silicone to prove our Turbo-charger (CAC) and intake hoses, under severe conditions at up to 230⁰C

At Leyland Hose and silicone, our priority is to ensure we can offer our customers a consistent and high quality, silicone hose, outperforming many other hoses offered on the market today.