Product Overview
Fire-Resistant
Hydraulic Fluid S3

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jan 27, 2026

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Fire-Resistant Hydraulic Fluid S3

Product Introduction

Protect your people
and facilities with effective fire-resistance

Choosing the right fire-resistant fluid can be a complex decision and involves balancing product performance, cost and regulatory requirements. Ongoing changes in industry standards can also influence the selection process.

Drive system efficiency in your hydraulic equipment with excellent component protection – all while reducing the risk of fluid ignition to improve the safety and productivity of your facilities.

Our range of fire-resistant hydraulic fluids provide enhanced protection to reduce the risk of ignition and prevent fire hazards in your operations.

Protect your people
and facilities with effective fire-resistance

Choosing the right fire-resistant fluid can be a complex decision and involves balancing product performance, cost and regulatory requirements. Ongoing changes in industry standards can also influence the selection process.

Drive system efficiency in your hydraulic equipment with excellent component protection – all while reducing the risk of fluid ignition to improve the safety and productivity of your facilities.

Our range of fire-resistant hydraulic fluids provide enhanced protection to reduce the risk of ignition and prevent fire hazards in your operations.

Operate in severe conditions

Operate productively and safely in extremely high or low temperatures, with consistent viscosity delivering responsive performance.

Wear protection

Reduce your maintenance costs with enhanced anti-wear properties that keep your equipment components and hydraulic fluid systems running smoothly for longer.

Extended service life

Avoid the need for maintenance with high-performance fluids and oil monitoring services to improve your productivity and lower your total cost of ownership (TCO).

Enhanced safety

Reduce the risks of even your most demanding applications with hydraulic fluids engineered to protect your people and assets from increased fire hazards.

Reduce your
impact on the environment

Mining or steel operations in environmentally sensitive settings need hydraulic fluids that not only deliver high levels of protection to equipment but also help you reduce the impact, of an accidental leak or spill, to the ecosystems around your facilities.

Our portfolio of specially formulated fire-resistant hydraulic fluids are difficult to ignite and designed not to propagate a flame from an ignition source, in comparison to mineral-based fluids.

It also features products that are classified as readily biodegradable with low eco-toxicity – engineered to reduce the impact of spills and leaks, helping you meet your environmental responsibilities.

Discover our
fire-resistant hydraulic fluids

Our portfolio of fire-resistant hydraulic fluids is designed for effective fire-risk reduction, across a range of metal, industrial and mobile applications. Using fire-resistant lubricants is a cost-effective option compared with installing mechanical fire-suppression equipment.

We help customers to make the right selection for their business through a detailed dialogue about the products that could, and should, be selected for each application. This advice draws on Shell’s expertise with the products and the customer’s understanding of the end use.

Explore our fire-resistant port

Product Technology ISO VISCOSITY GRADES Benefits & Applications
Shell Turbo S5 DR HFDR: tri-aryl phosphate based on butylated phenol 46 Good oxidation and hydrolytic stability, low foaming, FM Approved, ISO 12922.
Shell Fire-Resistant Hydraulic Fluid S3 DU HFDU: nonaqueous synthetic polyalkylene glycol (PAG/ HPEG) 46, 68, 100 Excellent wear protection, oxidation and thermal stability, FM Approved.
Shell Fire-Resistant Hydraulic Fluid S2 DU HFDU: nonaqueous synthetic organic esters (HEES) 46, 68 Good wear protection and system efficiency. Readily biodegradable¹, low toxicity, >80% bio-based. FM Approved, ISO 12922
Shell Fire-Resistant Hydraulic Fluid S1 DU HFDU: nonaqueous natural ester (HETG) and polyalkylene glycol (PAG) blend 32, 40, 60 Good wear protection. Readily biodegradable¹, low toxicity, USDA certified. FM Approved
Shell Water-Glycol S2 CX HFC: Water-glycol 46 High-pressure performance up to 4,000 psi, all-season performance. FM Approved, ISO 12922
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Make a safe switch to
fire-resistant hydraulic fluids

Switching from a mineral oil to a water-based or synthetic hydraulic fluid with fire-resistant properties is an effective way to improve the safety of your facilities. Using fire-resistant lubricants is a cost-effective option compared with installing mechanical fire-suppression equipment.

However, care must be taken to ensure the conversion is carried out correctly. It is important to review OEM requirements to confirm the compatibility of a lubricant with system components (including seals, hoses and filters). Even when using compatible lubricants, a small quantity of mineral oil can impair the fire resistance and stability of the new hydraulic fluid.

Similarly, when converting from one fire-resistant fluid category to another, the lubricants must not come into contact. Mixing incompatible lubricants can result in equipment failure. Even hydraulic fluids from the same category, but from different suppliers, should not be mixed unless you can clearly establish their compatibility. Be sure to consult with suppliers when looking to switch to an alternative hydraulic fluid.

Discover our
fire-resistant fluid range

From product performance to regulatory requirements, a lot goes into choosing the right fluid for your metals operation. Our latest brochure covers everything you need to know about fire-resistant fluids, so you can be safe in the knowledge that your equipment will stay protected and effective.