Who makes fluids & coolant treatment for AI data centers
The coolant fluids that circulate through direct-to-chip and immersion loops, plus the chemical treatment (inhibitors, biocides) that keeps them stable over the life of the loop.
Three fluid families cover this part: single-phase dielectric fluids used mainly in immersion tanks; two-phase fluids that rely on evaporation and recondensation for either immersion or emerging two-phase cold-plate systems; and glycol-water blends with corrosion and biological inhibitors used in conventional direct-to-chip loops feeding cold plates and manifolds. Fluid choice is tied to the cooling architecture chosen upstream — a rack built for direct-to-chip cold plates uses a different fluid than an immersion tank — so this part depends on decisions made at 5.01 and 5.08. The category is in the middle of a real supply shift: one major two-phase and dielectric fluid producer is exiting part of its product line at the end of 2025 for PFAS-related reasons, which pushes qualification work toward the remaining suppliers and toward newer entrants developing alternative chemistries. Investors should watch how much of the exiting volume gets absorbed by other established chemical makers versus smaller, newer entrants, and whether operators standardize on a narrower set of approved fluids as PFAS scrutiny continues.
AI delta: The AI-driven shift of racks to direct-to-chip and immersion cooling created new, coolant-specific demand for glycol-water and dielectric fluid chemistries just as a major two-phase and dielectric fluid producer exits part of its line for PFAS-related reasons at the end of 2025.
Companies on this part (0)
| Company | Role | Ownership | Ticker | Price | 1d | Confidence | Note |
|---|
Single-phase dielectric 5.09a
| Company | Role | Ownership | Ticker | Price | 1d | Confidence | Note |
|---|---|---|---|---|---|---|---|
| Castrol · unit of BP | manufacturer | subsidiary | BP* | inferred | |||
| ExxonMobil | manufacturer | public | XOM | 183 USD | +2.5% | inferred | |
| Lubrizol · unit of Berkshire | manufacturer | subsidiary | BRK-B* | inferred | |||
| Shell | manufacturer | public | SHEL | 108 USD | +2.3% | inferred | |
| Cargill | manufacturer | private | inferred | ||||
| Engineered Fluids | manufacturer | private | inferred |
Two-phase 5.09b
Direct-to-chip coolant (PG25) and inhibitors 5.09c
| Company | Role | Ownership | Ticker | Price | 1d | Confidence | Note |
|---|---|---|---|---|---|---|---|
| BASF | manufacturer | public | BAS.DE | 52.45 EUR | +0.0% | inferred | |
| Castrol · unit of BP | manufacturer | subsidiary | BP* | inferred | |||
| ChemTreat · unit of Danaher | manufacturer | subsidiary | DHR* | inferred | |||
| Dow | manufacturer | public | DOW | 32.61 USD | +2.7% | inferred | |
| Ecolab (Nalco) | manufacturer | public | ECL | 289 USD | -1.3% | inferred | |
| Kurita | manufacturer | public | 6370.T | 6889 JPY | -2.9% | inferred | |
| LyondellBasell | manufacturer | public | LYB | 66.45 USD | +1.8% | inferred | |
| Shell | manufacturer | public | SHEL | 108 USD | +2.3% | inferred |
Seen in real machines
fluids & coolant treatment is named in 1 of the rack teardowns and supercomputer breakdowns on this site. Each line below is a piece of that machine. The companies shown are the ones named on that line, not necessarily the maker of this part.
- Nvidia GB300 NVL72 · rack teardown
- Coolant (PG25) and treatment — Dow, BASF, Ecolab (Nalco), ChemTreat, Kurita
Nearby parts
- Children: Single-phase dielectric, Two-phase, Direct-to-chip coolant (PG25) and inhibitors
- Previous in layer: Immersion cooling systems
- Next in layer: Leak detection, flow & pressure sensing
- Layer: Layer 5 — Liquid cooling (IT-side: chip to CDU)
From the blog
- Part of the day: Fluids & coolant treatment 2026-10-12
Latest feed
- Closing the Loop: Are closed-loop systems the solution to data centers' water woes? — Data Center Dynamics, 2026-10-20The article questions whether implementing closed-loop water systems is the definitive solution for the water usage challenges facing data centers.
- Warm-water ready — Data Center Dynamics, 2026-10-15The report compares the performance and efficiency of two-phase versus single-phase direct-to-chip cooling solutions specifically on NVIDIA B200 server hardware.
- DIGITIMES Insight: AI data demand surges as power and cooling become new bottlenecks — DigiTimes, 2026-10-04Increasing AI data center demand is creating significant logistical and infrastructure bottlenecks specifically regarding power availability and cooling capacity.
- Sponsored: Castrol launches Castrol CORE, an integrated thermal management offer for data centers — Data Center Dynamics, 2026-10-01Castrol has launched Castrol CORE, a thermal management solution specifically designed for data center cooling systems.
- NVIDIA Announces DSX Ready Qualification Program for Data Center Power and Cooling Hardware — ServeTheHome, 2026-09-22NVIDIA launched the DSX Ready program, a qualification standard for data center power and cooling hardware used in AI data center construction.
- Wiwynn chair says AI hardware is being reshaped by power, cooling, interconnect demands — DigiTimes, 2026-09-21AI infrastructure demands are reshaping global hardware design, forcing focus on power, cooling, and high-speed interconnect solutions.
- Sponsored: Retrofitting existing data centers for AI: Two practical paths to liquid cooling — Data Center Dynamics, 2026-09-18The article outlines two practical methods for existing data center operators to implement liquid cooling without requiring a full facility overhaul.
- Sponsored: Why cooling media quality monitoring is becoming a critical part of data center liquid cooling strategies — Data Center Dynamics, 2026-09-15Monitoring the quality of the cooling medium is becoming as critical to data center liquid cooling as the system's thermal performance.
- Why insurers pay attention to data center cooling — Data Center Dynamics, 2026-09-15Insurers are focusing on the reliability of cooling systems because of the increasing importance of thermal management in data centers.
- Why coolant health is becoming an uptime issue for AI data centers — Data Center Dynamics, 2026-09-14Maintaining coolant health is becoming a key factor in the operational uptime of AI data centers.
Questions about fluids & coolant treatment
- What is fluids & coolant treatment?
- The coolant fluids that circulate through direct-to-chip and immersion loops, plus the chemical treatment (inhibitors, biocides) that keeps them stable over the life of the loop.
- How does AI change demand for fluids & coolant treatment?
- The AI-driven shift of racks to direct-to-chip and immersion cooling created new, coolant-specific demand for glycol-water and dielectric fluid chemistries just as a major two-phase and dielectric fluid producer exits part of its line for PFAS-related reasons at the end of 2025.
Sources: placements without a source URL come from the taxonomy seed and are tagged accordingly. How this data is built.· Markdown · JSON