When to Use Silicone Hose Instead of Rubber

The case for silicone over rubber comes down to temperature, service life, and, in some applications, compliance. Silicone handles a far wider temperature range. It doesn't age and harden the way rubber does. And in food grade form, it meets the compliance requirements for direct product contact in food and pharmaceutical settings.

For automotive use, the most common application is cooling system hose, radiator hoses, heater hoses, and turbo inlet plumbing. Performance and motorsport builds use silicone as standard because it lasts longer and handles higher coolant temperatures than EPDM rubber. For a standard road car, rubber is perfectly adequate; silicone is a step up that costs more, but you won't be replacing it.

In food and pharmaceutical manufacturing, silicone tubing is used for fluid transfer, peristaltic pump lines, and sampling applications because it doesn't leach, is easy to sterilise, and holds its shape over repeated autoclave cycles.

For general industrial use, HVAC ducting connections, instrument lines, vacuum applications, silicone's flexibility across temperature extremes and its resistance to ozone and UV degradation make it a practical choice over rubber in exposed or high-temperature environments.

Silicone is not good with hydrocarbons. Don't use it for oil or fuel applications; that's what nitrile and PTFE are for.

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