The Silflex Profuel® hose is specially developed fluoroelastomer lined silicone hose for use where greater fuel/oil resistance is required than can be achieved with conventional fluorosilicone. One of the principal driving forces behind the development of the fluoroelastomers was improved fuel resistance compared to any of the previously available elastomers, and it is still the best conventional elastomeric material available for fuel applications.
The high fluorine content elastomer used in the Silflex Profuel® material is recommended as having the best resistance to automotive grade fuels, of any of the fluoroelastomers, together with good compression set for excellent sealing characteristics, a critical feature in fuel hose applications to minimise evaporation losses at joints. This plus its excellent high temperature resistance, means that in conjunction with silicones excellent high temperature properties the Profuel® hose is ideal for high temperature under bonnet applications.
The Profuel® lining has very low permeability and is inherently self extinguishing in the case of fire.