Key highlights
- 1The dielectric immersion cooling fluids market is expected to reach USD 1.85 billion by 2036, at a CAGR of 21.5% from 2026 to 2036, driven by AI heat loads and the shift to single-phase synthetic fluids, from a small base.
- 2AI heat loads drive immersion. AI workloads, GPU clusters and high-density racks are increasing heat loads beyond the limits of air cooling, making immersion cooling and its dielectric fluids a solution for the highest densities.
- 3Single-phase leads and grows. Single-phase fluids, chiefly synthetic hydrocarbons and esters that remain liquid, are the safe, scalable and lower-cost path and dominate the market, while two-phase fluorinated fluids are a premium, higher-cost segment.
- 4PFAS phase-out reshapes two-phase. 3M announced it would exit all PFAS and ceased manufacturing its Novec fluids, used in two-phase immersion, at the end of 2025, and EPA rules on PFAS add difficulty, pushing the market toward single-phase alternatives.
- 5Majors are entering the market. Petrochemical and lubricant companies including Shell, Castrol, ExxonMobil, ENEOS and others have brought dielectric cooling fluids to market, with Shell's DLC Fluid S3 improving thermal conductivity by about 25% over mineral-oil baselines.
- 6Chemistry matters. Synthetic hydrocarbons and esters offer better thermal stability, dielectric strength, oxidation resistance and material compatibility than mineral oil, supporting reliable long-life immersion.
- 7Key companies include Shell plc, Castrol (bp), ExxonMobil Corporation, TotalEnergies SE, and Engineered Fluids.
Report Overview
The dielectric immersion cooling fluids market covers the non-conductive fluids used to cool data center IT equipment by immersion, spanning single-phase and two-phase systems and synthetic hydrocarbon, ester, mineral oil and fluorocarbon chemistries, across hyperscale, colocation, enterprise and edge and high-performance computing applications. Cold plates, immersion tanks, cooling distribution units and other hardware are outside the scope except as context. Immersion fluids are the consumable dielectric medium at the heart of immersion cooling, and demand scales with immersion adoption for AI. Demand is shaped by AI heat loads, efficiency and density, chemistry and regulation, and the entry of majors. This report examines the size, drivers, fluid types, chemistries, applications, pricing, regions, competition, recent developments, and outlook of the market, and provides recommendations. Sizing is built bottom-up from fluid volumes and prices by type, chemistry, application and region, and reflects fluids used in data center immersion cooling.
Market dynamics
Drivers
- 01AI heat loads are the primary driver as AI workloads, GPU clusters and high-density racks push heat beyond the limits of air cooling, and immersion cooling, which submerges equipment in dielectric fluid, removes this heat directly, driving demand for fluids.
- 02Efficiency and density are drivers as immersion supports the highest rack densities and can improve energy efficiency, and dielectric fluids are the medium that enables it.
- 03The entry of petrochemical and lubricant majors is a driver of supply and innovation, as companies including Shell, Castrol and ExxonMobil bring engineered dielectric fluids to market, improving performance and availability.
- 04Regulation is a driver of the mix as the phase-out of PFAS-based fluorinated fluids used in two-phase immersion shifts demand toward single-phase synthetic hydrocarbon and ester fluids.
Opportunities
- 01Single-phase synthetic hydrocarbon and ester fluids are the leading opportunity, because they are the safe, scalable and lower-cost path favoured for hyperscale immersion, and majors are launching engineered products.
- 02Bio-based and natural ester fluids are an opportunity for sustainability-focused operators.
- 03PFAS-free two-phase alternatives are an opportunity as the two-phase segment seeks replacements for phased-out fluorinated fluids, though these remain challenging.
- 04Fluid management including monitoring, filtration, top-up and end-of-life handling, is an opportunity for recurring service.
Trends
- 01The shift to single-phase fluids is the defining trend as synthetic hydrocarbons and esters that stay liquid are favoured for their safety, scalability and lower cost.
- 02The PFAS phase-out is a structural trend as 3M ceased Novec manufacturing at the end of 2025 and EPA rules add difficulty, reducing the fluorinated fluids used in two-phase immersion.
- 03Engineered product launches by majors are a trend with Shell's DLC Fluid S3, Castrol's ON DC range and others improving thermal performance.
- 04A focus on long-life and material compatibility is a trend as fluids are engineered for thermal stability, oxidation resistance and compatibility with server materials.
Report Summary
| Base Year | 2025 |
|---|---|
| Forecast Period | 2026-2036 |
| Market Size (2025) | USD 220 million |
| Market Size (2026) | USD 267 million |
| Market Size (2036) | USD 1.85 billion |
| CAGR (Value) | 21.5% (2026-2036) |
| Format | PDF & Excel |
| Segments Covered | By Type: Single-Phase, Two-Phase. By Fluid Chemistry: Synthetic Hydrocarbons, Esters, Mineral Oils, Fluorocarbons. By Application; By Region. |
| Geographies Covered | North America, Asia-Pacific, Europe, Latin America, and Middle East & Africa |
| Key Companies | Shell plc, Castrol (bp), ExxonMobil Corporation, TotalEnergies SE, ENEOS Corporation, Fuchs SE, Engineered Fluids, Submer, Syensqo, Chemours Company, Perstorp, Other Companies |
Segmental analysis
By Type
- Single-phase fluids hold the largest share at about 80% of the market in 2026, with two-phase fluids accounting for the remainder.
- Single-phase fluids which remain in the liquid state and remove heat by circulation, chiefly synthetic hydrocarbons and esters, are the largest type because they are the safe, scalable and lower-cost path, are favoured for hyperscale immersion, and avoid the regulatory and cost issues of fluorinated fluids.
- Two-phase fluids which boil on the hot components and condense, are fluorinated or synthetic and offer high heat-removal performance, but are a premium, higher-cost segment now constrained by the phase-out of PFAS-based fluids.
The dominance of single-phase fluids reflects their safety, cost and regulatory advantages, and the shift away from two-phase reinforces it.
By Fluid Chemistry
- Synthetic hydrocarbons including polyalphaolefins and gas-to-liquid bases, hold the largest share, at about 45% of the market in 2026, with the remaining share divided across esters, mineral oils and fluorocarbons.
- Synthetic hydrocarbons are the largest chemistry because they offer strong thermal stability, dielectric strength, oxidation resistance and material compatibility, and are the basis of leading single-phase products such as Shell's and Castrol's.
- Esters both synthetic and natural or bio-based, are a growing chemistry valued for performance and sustainability.
- Mineral oils are a lower-cost lower-performance option with an installed base.
- Fluorocarbon engineered fluids serve two-phase immersion but are declining with the PFAS phase-out.
The dominance of synthetic hydrocarbons reflects their balance of performance, cost and compatibility.
By Application
- Hyperscale and AI hold the largest share at about 55% of the market in 2026, with the remaining share divided across colocation, enterprise and high-performance computing, and edge.
- Hyperscale and AI are the leading application because AI and GPU workloads generate the heat that drives immersion adoption, and hyperscale operators deploy immersion for the highest densities.
- Colocation providers adopt immersion for AI-ready capacity.
- Enterprise and high-performance computing including research and, historically, cryptocurrency mining, use immersion for dense compute.
- Edge uses immersion in compact sealed deployments.
The dominance of hyperscale and AI reflects that immersion fluid demand is driven above all by AI heat loads.
Geographic analysis
North America Dielectric Immersion Cooling Fluids Market
North America is the largest regional market driven by the concentration of hyperscale and AI data center construction and early adoption of immersion cooling, and hosts major fluid suppliers and adopters. The region leads in AI-ready capacity and in the deployment of single-phase immersion, and the PFAS phase-out and EPA rules are shaping the shift to non-fluorinated fluids. Strong hyperscale investment and AI density make North America the leading and fast-scaling market for immersion fluids.
Europe Dielectric Immersion Cooling Fluids Market
Europe is a significant market with data center hubs, sustainability focus and growing AI capacity, and demand for immersion fluids across hyperscale and colocation. European operators favour single-phase and bio-based fluids for sustainability, and suppliers such as Shell, Castrol, TotalEnergies and Fuchs and ester makers such as Perstorp serve the region, where PFAS regulation is stringent. Europe is a growing market shaped by sustainability and regulation.
Asia-Pacific and Rest of World
Asia-Pacific is a large and fast-growing market with major data center construction in China, Japan, India and Southeast Asia and rising AI capacity, and immersion adoption supported by suppliers including ENEOS, SK Enmove and Petronas alongside global majors. The rest of the world, including the Middle East, adds growing demand as data center investment spreads. These regions add strong growth as AI-ready immersion capacity is built.
Pricing Analysis
Pricing in dielectric immersion cooling fluids reflects fluid type, chemistry, and volume. Single-phase synthetic hydrocarbon and ester fluids are lower cost than two-phase fluorinated fluids, which are premium-priced and now constrained by the PFAS phase-out, so the shift to single-phase lowers the average fluid cost while improving availability. Fluid is a consumable, priced per volume, and large immersion deployments require significant fluid fill and top-up. Several factors set price. Fluid type is central, as two-phase fluorinated fluids cost far more than single-phase hydrocarbons and esters. Chemistry affects price, with engineered synthetic fluids priced above mineral oil for their performance. Volume matters, as large tanks require large fluid fills. Performance and life affect value, as thermally stable, long-life fluids reduce replacement. Regulation affects cost and availability, as PFAS restrictions raise the cost and risk of fluorinated fluids. Fluid management, including filtration and top-up, is a recurring cost.
The trajectory of pricing depends on the shift to single-phase, chemistry innovation, and scale, and the move to single-phase engineered fluids improves cost and availability even as premium performance fluids command higher prices.
Competitive landscape
The market is served by petrochemical and lubricant majors, specialty fluid companies, and fluorinated-fluid makers. Shell offers dielectric cooling fluids including DLC Fluid S3, a synthetic hydrocarbon improving thermal conductivity by about 25% over mineral oil, and Castrol, part of bp, offers its ON DC range of synthetic hydrocarbon immersion fluids. ExxonMobil, TotalEnergies, ENEOS, Fuchs, HF Sinclair, Gulf Oil, Petronas and SK Enmove have brought dielectric fluids to market, and Perstorp supplies ester chemistries. Specialty companies including Engineered Fluids and system providers such as Submer supply immersion fluids, and fluorinated-fluid makers Syensqo and Chemours, along with Honeywell, supply two-phase fluids, though 3M has exited PFAS and ceased Novec manufacturing.
Competition turns on thermal performance, dielectric properties and material compatibility, regulatory compliance and safety, cost and availability, and technical support, and the market combines global majors entering a growth market with specialty and fluorinated-fluid providers. AI heat loads, the shift to single-phase and the PFAS phase-out favour suppliers with strong single-phase synthetic and ester portfolios, and Shell, Castrol, ExxonMobil and others hold strong positions, while two-phase providers navigate regulation. The field is competitive and fast-growing, with rapid product development as immersion cooling scales for AI.
Voice of Customer
For our densest AI deployments, immersion removes heat that air and even cold plates struggle with, and the dielectric fluid is central to it. We use single-phase synthetic hydrocarbon fluids because they are safe, scalable and avoid the regulatory issues around fluorinated two-phase fluids, and we care about thermal performance, material compatibility and long life so we are not replacing fluid often.
Cooling engineer, hyperscale operator (North America):
We favour single-phase and bio-based ester fluids for immersion because of sustainability and PFAS regulation, which is strict here. The exit of fluorinated two-phase fluids pushed us firmly to single-phase, and we work with the major suppliers who now offer engineered dielectric fluids with strong support.
Sustainability lead, colocation provider (Europe):
Immersion lets us run very dense compute, and fluid choice drives reliability. We evaluate fluids on dielectric strength, thermal conductivity and compatibility with our hardware, and we value having petrochemical majors in the market for supply security and consistent quality as we scale.
Facilities manager, HPC center (Asia-Pacific):
Analyst perspective
The dielectric immersion cooling fluids market is a small but fast-growing market driven by AI heat loads and reshaped by regulation. Immersion cooling submerges IT equipment in dielectric fluid to remove heat that air cooling cannot, and AI workloads and high-density racks are driving its adoption, with the fluid the consumable medium at its heart. The decisive dynamic is the shift to single-phase synthetic hydrocarbon and ester fluids, which are safe, scalable and lower cost and now dominate, reinforced by the phase-out of the PFAS-based fluorinated fluids used in two-phase immersion, as 3M ceased Novec manufacturing at the end of 2025 and EPA rules add difficulty. Petrochemical and lubricant majors, including Shell, Castrol and ExxonMobil, have entered with engineered fluids, improving performance and supply.
The honest considerations are immersion's minority position, the AI capital cycle, and two-phase uncertainty. Immersion cooling remains a minority of data center liquid cooling, behind direct-to-chip cold plates, because it requires custom servers and tanks and adds maintenance complexity, so immersion fluid demand, while fast-growing, is from a small base and depends on immersion adoption. The market's growth rests on continued AI data center investment, which is cyclical, so the figures should be read as tied to the AI buildout and to immersion's share of it. Two-phase immersion faces real disruption from the PFAS phase-out, with replacements challenging, so the two-phase fluid segment is uncertain even as single-phase grows. The market should be assessed on immersion adoption, the single-phase shift, and regulation rather than on the AI theme alone, and AI heat loads, the single-phase shift and majors' entry support strong growth from a small base, with immersion's share and the AI cycle the key variables.
Key Strategic Developments
- End of 2025: 3M ceased manufacturing its Novec fluids, used in two-phase immersion cooling, as part of its exit from all PFAS, and EPA rules on PFAS added difficulty, accelerating the shift to single-phase fluids.
- 2024-2026: Shell introduced DLC Fluid S3, a synthetic hydrocarbon improving thermal conductivity by about 25% over mineral-oil baselines, targeting single-phase hyperscale immersion.
- 2024-2026: Castrol expanded its ON DC synthetic hydrocarbon immersion range, and ExxonMobil, ENEOS, TotalEnergies and others brought dielectric fluids to market as majors entered the segment.
- 2024-2026: AI workloads and high-density racks drove immersion cooling adoption, increasing demand for dielectric fluids for the highest-density applications.
- 2024-2026: Ester and bio-based fluids, including from Perstorp, grew as sustainability-focused single-phase options alongside synthetic hydrocarbons.
Strategic Recommendations
For fluid suppliers
The priority is to expand single-phase synthetic hydrocarbon and ester portfolios and to ensure performance, compatibility and supply, because the market is shifting decisively to single-phase and demand is scaling with AI immersion. Companies should develop engineered synthetic and ester fluids with strong thermal stability, dielectric strength and material compatibility, offer bio-based options for sustainability, provide fluid management and support, and navigate PFAS regulation for any two-phase offerings. Serving hyperscale and colocation operators and building supply security strengthen the position.
For data center operators
The recommendation is to select single-phase engineered fluids for immersion where density requires it, evaluating dielectric strength, thermal performance, compatibility and life, and to plan for the phase-out of fluorinated two-phase fluids. For system providers, integrating fluids with tanks and management is the key task. For investors, this is a small, fast-growing market tied to immersion cooling and AI, to evaluate on immersion adoption, the single-phase shift and regulation rather than on the AI theme alone, recognising that AI heat loads and the single-phase shift support strong growth from a small base while immersion's share of liquid cooling and the AI cycle are the key variables.
Sustainability impact
Energy Efficiency and Heat Reuse
Immersion cooling with dielectric fluids can improve data center energy efficiency and enable heat reuse. Immersion fluids support energy efficiency.
By removing heat directly and efficiently, immersion cooling can lower the energy used for cooling and capture heat at useful temperatures for reuse, and the dielectric fluid is the medium that enables this efficiency in high-density data centers.
Avoiding PFAS and Forever Chemicals
The shift to single-phase synthetic hydrocarbon and ester fluids avoids the PFAS-based fluorinated fluids that raise environmental and regulatory concern. Immersion fluids support safer chemistry.
By moving from fluorinated two-phase fluids to single-phase hydrocarbons and esters, the market reduces reliance on PFAS forever chemicals, addressing environmental and regulatory concerns that led to the phase-out of fluids such as Novec.
Bio-Based Fluids and Lower Impact
Ester and bio-based dielectric fluids offer lower-impact, renewable options for immersion cooling. Immersion fluids support renewable options.
By using ester and bio-based chemistries, immersion fluids can offer renewable, lower-impact options, supporting sustainability goals for operators seeking to reduce the footprint of their cooling media.
Fluid Life, Handling, and Recyclability
The sustainability of immersion fluids depends on long life, safe handling, and end-of-life management. Immersion fluids require responsible stewardship.
By using large volumes of fluid, immersion depends on long fluid life, safe handling and end-of-life management and recycling, so responsible stewardship of the dielectric fluid is essential to the sustainability of immersion cooling.
Table of contents
14 chapters · 192 pages · click to expandFrequently asked questions
The dielectric immersion cooling fluids market was valued at USD 220 million in 2025 and is projected to reach USD 1.85 billion by 2036, growing from USD 267 million in 2026, at a CAGR of 21.5% from 2026 to 2036, driven by AI heat loads and the shift to single-phase synthetic fluids, from a small base.