Hose Material Compatibility: Which Hose Is Safe for Your Fluid?

Get the hose material wrong for a chemical transfer job and the failure is rarely slow. Acids, solvents and caustic fluids attack the wrong tube compound within days, sometimes hours, and the first sign is often a burst hose rather than a warning. 

This guide sets out which hose materials resist which chemicals, why the outer cover tells you nothing about what's inside, and how to check compatibility properly before you specify a hose for your fluid. Keep reading to learn more…

Why the outer cover tells you nothing

The outer cover of a hose is there to protect the reinforcement from abrasion, weather and mechanical damage. It has no contact with the fluid being carried and no bearing on chemical resistance. Two hoses can look identical from the outside, in the same black rubber cover with the same braid pattern, and have completely different tube materials underneath. One might be nitrile, built for oils and fuels. The other might be EPDM, built for water-based and caustic fluids. Feed the wrong fluid through either one and the tube degrades from the inside, often before any external sign of damage appears.

This is the single most common specification mistake we see: someone orders "the same hose as last time" by looking at the cover, when the fluid has changed and the tube material needs to change with it. Always confirm the tube compound, not just the hose's appearance, before you use it for a new fluid.

What determines chemical resistance?

Four factors decide whether a hose will hold up against a given chemical. Get any one of them wrong and the hose can fail even if the material choice looks right on paper.

Tube material

The tube is the only part of the hose in contact with the fluid, and it is the material that determines chemical resistance. This is the starting point for every specification decision, and it's covered in detail material by material below.

Temperature

Chemical resistance ratings are given at a specific temperature, usually room temperature (around 20°C), because resistance drops as temperature rises. A tube material rated as resistant to a chemical at 20°C can degrade rapidly at 60°C. Always check the fluid's actual operating temperature against the manufacturer's rating, not just the chemical name.

Concentration

Concentration changes the answer as much as temperature does. EPDM, for example, handles dilute sulphuric acid reasonably well but degrades quickly at higher concentrations. Always specify the actual concentration you're handling when checking compatibility, not just the chemical family.

Duration of contact

A hose used for occasional transfer and rinsed after use faces a different challenge to one in continuous service. Manufacturer compatibility charts usually rate materials for continuous contact. If your application is intermittent, that's a safety margin, not a reason to ignore a poor rating.

Nitrile rubber (NBR)

NBR is the default for fuel hoses for good reason. It resists petroleum-based oils, diesel, and petrol reliably and has been the standard material across automotive, agricultural, and industrial fuel systems for decades.

For standard mineral diesel, biodiesel blends up to approximately B20, mineral oils, hydraulic oils, and petroleum-based lubricants, NBR is the correct choice. LP gas is also generally fine.

The problem is ethanol. E10, standard UK pump petrol since September 2021, is broadly considered acceptable for NBR in the short term. Prolonged exposure, though, can cause swelling and softening, particularly in older hoses not formulated with ethanol content in mind. E85 will degrade NBR progressively, full stop. Ketones, esters, and strong oxidising acids are also problematic.

In practice, this is the question to ask about any existing rubber fuel line on older vehicles or equipment: when was it installed, and what was the petrol grade at the time? NBR hose specified before around 2010 was designed around E0 or E5. It may still be performing fine, or it may be soft and porous in ways that aren't visible from the outside. Replacing aged fuel lines with nitrile rated for current E10 exposure, or moving to PTFE, is the lower-risk option for anything running continuously.

You'll find NBR in fuel delivery hose, oil and fuel hose assemblies, and hydraulic return lines.

Shop oil & fuel hoses →

PTFE (polytetrafluoroethylene)

When compatibility is uncertain, PTFE is the material to reach for. It resists nearly every common industrial fluid, fuels, oils, chemical, and solvent across a wide temperature range (roughly -60°C to +200°C in most grades). The inner bore is smooth enough to matter in food and pharmaceutical applications where surface cleanliness is important.

For fuel work specifically, it handles petrol, diesel, ethanol at any blend concentration, biodiesel, methanol, and most race and performance fuels without issue. It's also resistant to strong acids at moderate concentrations and most alkalis and solvents. The list of things it won't handle in normal industrial use is short: certain fluorinated compounds and molten alkali metals, neither of which you'll encounter in a hose application.

The real trade-off with PTFE is flexibility. It's less pliable than rubber, has a tighter minimum bend radius, and won't forgive being kinked during installation. For a fixed or low-movement installation, that's rarely a problem. For an application where the hose flexes regularly, you need to confirm the bend radius can actually be maintained in service, not just at installation.

The cost is higher than rubber. For a static fuel line where the compatibility question is the concern, it's worth it. For a low-stakes application running standard mineral diesel with no ethanol, NBR does the same job at lower cost.

PTFE is used in braided fuel lines for performance and modified vehicles, food and pharmaceutical process hose, chemical transfer lines, and high-temperature applications generally.

Shop oil & fuel hoses →

EPDM (ethylene propylene diene monomer)

EPDM and oil are genuinely incompatible. Petrol, diesel, mineral hydraulic oil, and petroleum lubricants will cause EPDM to swell rapidly, it doesn't deteriorate slowly, it goes quickly. This is the most common wrong-material selection we see, usually because someone picked a generic rubber hose without checking the tube compound.

Where EPDM belongs is in steam, hot water, and certain chemical applications. It handles steam to approximately 180°C depending on grade, hot water, brake fluid, dilute acids and alkalis, many ketones, alcohols, and phosphate ester hydraulic fluids. It also holds up well to ozone and weathering, which matters in outdoor or plant-side installations.

The steam case is worth dwelling on. EPDM is the standard inner tube material for steam hose because it handles the combination of heat and condensate that degrades other rubbers. For food processing, brewing, pharmaceutical cleaning, or industrial washdown with steam, EPDM is almost certainly what you need. The important check is the specific temperature and pressure rating for the grade you're buying. A hose rated for 8 bar at 120°C is not the same product as one rated for the same pressure at 160°C, even if they look identical on the shelf.

EPDM is also the tube material for radiator hose on many vehicles, but see the silicone section below if thermal cycling is severe.

You'll find EPDM in steam hose, hot water hose, radiator and cooling system hose, chemical process hose, and brake and clutch hydraulic lines.

Shop oil & fuel hoses →

PVC (polyvinyl chloride)

PVC is cost-effective and, in clear grades, transparent enough to use as a sight glass or level indicator. It works well for water, compressed air, and mild chemicals at ambient temperatures. Its limitations are real and worth knowing.

Petroleum fuels and oils will cause PVC to swell and soften. Not eventually, fairly quickly. Don't use PVC for fuel service in any meaningful capacity. Clear PVC hose sometimes ends up short. runs as a visual indicator in fuel systems, which is borderline and not something to extend into working lines.

Temperature is the other limit. Standard-grade PVC loses flexibility at low temperatures (around 0°C and below, depending on the plasticiser content) and should not be used for steam or sustained hot water above about 60°C. For ambient-temperature compressed air at normal workshop pressures, it's fine. For discharge-side air from a compressor, hot and potentially oily, it isn't.

PVC serves well in water supply, low-pressure compressed air, food and drink transfer in food-grade specifications, drainage, and low-concentration chemical handling at ambient temperatures.

Shop PVC hoses →

Silicone

Silicone handles temperature extremes that most rubbers won't. It's the right call for coolant systems, turbo intercooler connections, and high-temperature air and gas ducting. It is not a fuel hose material.

Silicone is porous. Run petroleum-based fuel through it and the vapour permeates the wall; run liquid fuel through it and it swells and degrades structurally. "Silicone fuel hose" is not a real product for standard petrol or diesel applications, regardless of how it's sometimes marketed. There are fluorosilicone grades with limited fuel resistance, but they're specialised materials and not what people are typically buying off the shelf.

For coolant, water and glycol mixtures, silicone is genuinely worth the premium, particularly on performance engines or anywhere thermal cycling is aggressive. It outlasts standard rubber in that duty, stays flexible at low temperatures better than EPDM, and handles the peak temperatures that occur during hard running without cracking. The cost is higher but not dramatically so for a critical cooling line.

In platinum-cured grades, silicone is also used for food and pharmaceutical contact where extractables and leachables matter. Standard industrial silicone hose is not the same thing, check the grade.

Silicone is used in coolant and radiator hoses, turbo intake and intercooler hoses, hot air ducting, food and pharmaceutical hoses (platinum-cured grades specifically), and high-temperature general-purpose applications.

Shop Silicone hoses →

Neoprene (CR)

Neoprene sits in the middle ground between nitrile and EPDM. It handles moderate oil and fuel exposure better than EPDM but is not a substitute for nitrile in sustained fuel contact. Its real strengths are weathering resistance, ozone resistance, and behaviour in marine and refrigerant environments.

It's used in marine applications, HVAC, refrigeration hoses, and situations requiring a general-purpose rubber with some chemical resilience. Strong oxidising acids, ketones, and aromatic hydrocarbons will degrade it. For sustained immersion in fuel or mineral oil, use nitrile.

Shop Neoprene hoses →

Choosing a hose for specific acids and chemicals

The material sections above cover general resistance profiles. For named acids and chemicals, the safe choice depends on concentration as much as the fluid itself, so we've set out the most commonly asked-about substances below. This data is cross-checked against published compatibility charts from Tubes International and Continental ContiTech, and the two sources agree closely on the materials that matter: PTFE performs well across the board, and NBR performs poorly across the board.

Sulphuric acid

Concentration changes the answer sharply here. At low concentrations (around 10%), EPDM and PTFE both perform well and NBR offers limited, short-term resistance. At high concentrations (75% and above), only PTFE holds up reliably; EPDM's resistance drops to limited or intermittent duty, and NBR and PVC should not be used. At the highest concentrations (96%, oleum-grade), PTFE remains the only dependable choice across both reference sources.

Hydrochloric acid

At lower concentrations (up to around 20%), PTFE and EPDM both give reliable continuous resistance, and PVC performs acceptably. At higher concentrations (around 37%, typical of concentrated hydrochloric acid), PTFE remains fully resistant, EPDM drops to good but not excellent, and PVC should be avoided. NBR is a poor choice at any concentration.

Sodium hydroxide (caustic soda)

Sodium hydroxide is one of the fluids EPDM was built for: both reference sources rate EPDM as excellent across typical working concentrations. PTFE is also fully resistant. PVC gives good, though not excellent, resistance. NBR is a poor choice and should not be used for caustic transfer.

Acetone

Acetone is one of the more aggressive common solvents for hose tube materials. PTFE is fully resistant. EPDM performs well. NBR and PVC both fail against acetone and should not be specified for it under any circumstances.

Aromatic solvents (benzene, toluene and similar)

Aromatic solvents attack nearly every common rubber compound. Both reference sources rate NBR, EPDM and PVC as not recommended for benzene, toluene and similar aromatics. PTFE is the only material on this list with reliable resistance, which is why chemical transfer specialists default to PTFE hose whenever the fluid contains aromatic solvents.

If you're specifying hose for any of the fluids above, our Acid & Chemical Hose collection is built around PTFE and other chemical-grade tube materials, with technical support available if your fluid or concentration isn't covered here.

Specific fluid decisions

Diesel

NBR is the standard choice for diesel transfer and handles it reliably across the temperature ranges most applications need. EPDM and silicone are not suitable; both degrade in contact with diesel fuel.

Petrol and ethanol blends

Standard NBR handles pure petrol well, but ethanol blends (E10 and above) require a fuel hose specifically rated for ethanol compatibility, since ethanol degrades standard nitrile compounds faster than pure petrol does. Check the hose's datasheet for an explicit ethanol rating rather than assuming standard fuel hose will cope.

Hydraulic fluid

Most mineral-based hydraulic fluids are compatible with NBR, which is why NBR is the standard tube material for hydraulic hose. Fire-resistant and biodegradable hydraulic fluids can require different tube compounds, so always check the fluid type against the hose datasheet rather than assuming standard hydraulic hose will cope with a non-standard fluid.

Compressed air

Compressed air is one of the least demanding applications for tube material chemical resistance, since air itself isn't chemically aggressive. The bigger consideration for air lines is pressure rating and, in outdoor or high-temperature settings, the cover material's resistance to weathering or heat.

Steam

Steam service demands a tube material rated for both the temperature and the specific pressure of saturated steam, not just a high maximum temperature figure. EPDM and silicone are the two materials most commonly rated for steam; always check the hose's steam-specific pressure and temperature rating rather than its general temperature range, since steam ratings are usually lower than the material's dry heat rating.

Hose material by fluid: full reference table

Use this table as a quick reference once you know your fluid. For anything outside it, or where concentration or temperature falls outside typical ranges, confirm against the manufacturer's datasheet before specifying.

What the outer braid doesn't tell you

The reinforcement layer, whether that's a textile braid, a wire braid or a spiral wind, is there to handle pressure and mechanical strength. Like the outer cover, it has no contact with the fluid and no bearing on chemical resistance. A wire-braided hose and a textile-braided hose can share the same chemically incompatible tube, and a hose with an impressive pressure rating on its label can still fail within hours if the tube material is wrong for the fluid. Always check the tube compound first, and treat pressure rating and chemical compatibility as two separate questions.

Temperature ratings apply at ambient

Manufacturer temperature ranges are typically quoted for the material in isolation, not for a specific fluid at a specific concentration. Running a hose at the top of its rated temperature range while also carrying a fluid it's only marginally compatible with compounds the risk: heat accelerates chemical attack on rubber compounds even within their stated range. When you're close to either limit, whether that's the temperature ceiling or the edge of a material's chemical compatibility, treat it as a reason to check the datasheet rather than proceed on the general range alone.

Hose material temperature ranges

Frequently asked questions

Which hose is chemical resistant?

PTFE hose has the widest chemical resistance of any common tube material and is the default choice when the fluid is aggressive, unknown, or a mix of chemicals. EPDM is a strong second choice for many caustic and polar fluids, but check the specific chemical and concentration against a compatibility chart before specifying either.

What hose is resistant to sulphuric acid?

It depends on concentration. PTFE resists sulphuric acid at all concentrations, including concentrated and oleum-grade acid. EPDM performs well at lower concentrations (around 10%) but its resistance drops at higher concentrations. NBR and PVC are not suitable for sulphuric acid at any meaningful concentration.

Is a PVC hose fuel resistant?

No. Standard PVC hose is not resistant to petrol, diesel or most fuels and will degrade quickly in fuel service. Use an NBR hose rated for the specific fuel type instead.

Is a silicone hose fuel resistant?

No. Silicone has poor resistance to fuels and mineral oils. It is a strong choice for heat, food-grade and hygiene applications, but not for fuel transfer.

What hose is compatible with ethanol fuel?

Standard NBR hose is not always suitable for ethanol-blended fuels above E10. Use a hose specifically rated for ethanol compatibility, and check the datasheet rather than assuming a standard fuel hose will cope.

Is a braided hose the same as a fuel resistant hose?

No. Braiding is a reinforcement layer for pressure and mechanical strength, and it has no bearing on chemical or fuel resistance. Fuel resistance depends entirely on the tube material inside the braid.

What is the difference between nitrile and EPDM hose?

Nitrile (NBR) resists oils, fuels and hydraulic fluids but degrades in caustic and many polar chemicals. EPDM resists caustics, dilute acids and water-based fluids but degrades in oils and fuels. They cover almost opposite ranges of fluids, so they are not interchangeable.

Can I use standard rubber hose for diesel?

Standard NBR rubber hose is suitable for diesel. General-purpose rubber hose without an NBR tube, such as EPDM or natural rubber, is not suitable and will degrade in diesel service.

What hose is safe for steam?

EPDM and silicone are the two materials most commonly rated for steam service. Always check the hose's steam-specific pressure and temperature rating, since this is usually lower than the material's general dry heat rating.

Get the right hose for your fluid at The Hosemaster

If you're handling acids, solvents or other aggressive chemicals, our Acid & Chemical Hose collection is built around PTFE and other chemical-grade tube materials, with technical guidance available if your fluid or concentration isn't covered in this guide.

For fuel and oil transfer rather than chemical duty, see our comparison of PVC and rubber fuel hose to check which suits your application.

Shop premium oil and fuel hoses →

For more news, information, and useful buying guides – with plenty of product advice – check out The Hosemaster blog…

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This guide is a general reference. Always verify compatibility against manufacturer datasheets for your specific fluid, temperature and pressure conditions before specifying hose for critical applications.