A common question that we get here at Flex Technologies regarding our silicone hoses is, “What happens if I run fuel or oil through that? Can I use it for my fuel lines?” So we thought we’d take a look at some of the common questions people have about this point and answer them.

Can you use silicone hoses for fuel or oil?

No, we don’t recommend it. For best results, we recommend that you stick with other materials than silicone for any applications that will allow fuel or oil to come into contact with the hose. However, we do offer special fluorocarbon and fluorosilicone liners that offer superior chemical resistance. Depending on the application that you are using the hose for, one of these products might be perfect. Our engineering department can guide you with more details and support you in designing a chemical-resistant hose that meets your specific requirements.

What happens when fuel or oil comes into contact with silicone?

Silicone has a molecular structure that is very stable overall at a wide range of temperatures and pressures, and its generally inert structure makes it safe for a range of applications from baby food to engine coolant. However, fuel and oil are some of the only substances that tend to break down this molecular structure, making it unreliable for use in your vehicle’s fuel lines. These substances tend to act as a solvent on your silicone, essentially dissolving it gradually. You can envision the way that water would gradually eat away at a tube made of cardboard. Oil, most acids, and dilute sodium hydroxide do this to silicone.

What should I do if I can’t use standard silicone?

Don’t despair! If you need a product that combines the superior heat resistance and custom fit of a silicone hose while also offering superior chemical resistance, why not try one of our special fluorocarbon and fluoro silicone liners? To be sure that this will meet your specifications, a member of our engineering team will be happy to give you more details.

Our silicone hoses are built to last and custom-suited to your specifications. We can even do special colors! However, for fuel lines, it’s not the best idea to use silicone. Place your order today and get the custom silicone tubes that you need.