PG25 coolant suppliers for direct-to-chip cooling

Updated 29 October 2026 · Independent, sourced reference

Quick answer

PG25 coolant suppliers in our sourced profiles: BASF, Shell, Castrol, Dow, Ecolab, Dynalene, PFX Group, Arteco. Most sell a ready-to-use 25% propylene glycol fluid for sealed secondary loops, and several report NVIDIA DSX Ready qualification. Use the form below to request quotes.

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Sourcing PG25 (propylene glycol 25%)? Tell us the fluid, volume and region once. With your consent we pass the request to up to three relevant suppliers. No cost to request.

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Key takeaways

  • PG25 = 25% propylene glycol plus inhibitors, ready to use.
  • Qualification wording differs by supplier.
  • Hardware and CDU vendor approval still applies.
  • Quote requests are free and go to up to three suppliers.

Supplier shortlist

SupplierProduct(s)Publicly reported qualificationHQ
BASFGLYTHERMIN data-center platform (launched 8 Oct 2026): GLYTHERMIN DC PG25 (ready-to-use 25% PG, >99.5% PG purity, hybrid inhibitors, fluorescent dye, stated to exceed ASTM D8039), GLYTHERMIN DC OAT PG25, GLYTHERMIN PG OATGLYTHERMIN DC PG25 qualified as an NVIDIA DSX Ready coolant (secondary-loop, single-phase cold-plate)Ludwigshafen, Germany
ShellShell DLC Fluid S3 (PG25, meets OCP PG25 specification, freeze protection −10 °C, green fluorescent dye, free of 2-EHA, borate and silicate); single-phase immersion cooling fluidsShell DLC Fluid S3 reported as NVIDIA DSX Ready (Oct 2026); immersion fluids Intel Data Center Certified for Immersion Cooling (4th/5th Gen Xeon)London, United Kingdom
CastrolCastrol ON PG25 (OAT) and PG25T (IAT), pre-diluted direct-to-chip fluidsCastrol ON PG25 and PG25T announced as validated for NVIDIA AI infrastructure (18 Aug 2026); Castrol CORE Cooling Solutions named by NVIDIA among DSX Ready coolant partners (Oct 2026)Pangbourne, United Kingdom
DowDOWFROST LC 25: ready-to-use inhibited 25% propylene glycol for sealed direct-to-chip loops, use up to 90 °C, freeze protection −10 °C, yellow dyeDow has publicly stated DOWFROST LC qualified as NVIDIA DSX ReadyMidland, Michigan, USA
EcolabPropylene-glycol coolant for direct liquid cooling, with procurement, on-site filling, analysis and monitoring services. Product name: not publishedEcolab states its PG coolant is qualified NVIDIA DSX ReadySaint Paul, Minnesota, USA
DynaleneDynalene PG-D25, a PG25 direct-to-chip fluid listed on the OCP MarketplaceNamed by NVIDIA among DSX Ready coolant partners (Oct 2026); the specific qualified product is not published5250 West Coplay Road, Whitehall, Pennsylvania, USA
PFX Group (Solutherm)SOLUTHERM OAT PG 25: ready-to-use 25% PG OAT fluid for secondary-loop direct-to-chip coolingListed on the OCP Marketplace; named among NVIDIA DSX Ready coolant partnersNot published
ArtecoZITREC EC line (launched 29 Apr 2025): MPG-, MEG- and water-based OAT direct-to-chip coolants, free of nitrites, borates and 2-EHAArteco states ZITREC EC 20 is NVIDIA-qualifiedSint-Denijs-Westrem, Belgium (registered office: Schoten)

Taken from our sourced supplier profiles (October 2026). Open a profile for the citations. "Not published" means we could not find a public source.

Server rack cold plate on GPUcold plate on CPU CDUpump · filter · heat exchanger Facility waterto chillers / dry coolers warmcool Technology cooling loop (e.g. PG25)Facility loop
Direct-to-chip cooling: the PG25 or water-based coolant stays in a closed technology loop; the CDU passes heat to the facility water loop.

Comparing data-center fluids?

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What to ask a PG25 supplier

  • Which qualifications apply to the exact product: NVIDIA DSX Ready, OCP PG25 guideline, your CDU vendor's approval.
  • Inhibitor type (OAT or IAT), dye and freeze point.
  • Pack sizes (drums, IBC totes, bulk), lead time and regional stock.
  • Fluid analysis or top-up services and recommended test intervals; see CDU coolant maintenance.

Compare before you buy

Compare PG25 with other fluids in the data-center coolant comparator, read what is PG25?, and check the NVIDIA DSX Ready list. Immersion instead? See immersion cooling fluid suppliers.

Frequently asked questions

Is PG25 sold ready to use?

The PG25 products in our profiles are sold pre-diluted, ready to use. Check each supplier's datasheet.

Does Coolant.com sell coolant?

No. We pass your request to suppliers, who quote you directly. Suppliers may pay us for introductions.

Data-center liquid cooling hub

NVIDIA DSX Ready coolants

What is PG25?

Direct-to-chip vs immersion

Immersion cooling fluid suppliers

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Sources

  1. BASF: Ludwigshafen site (headquarters)
  2. BASF news release, Oct 2026
  3. BASF GLYSANTIN/GLYTHERMIN: data center
  4. UK Companies House: Shell plc registered office
  5. Data Centre Magazine: NVIDIA qualifies Shell DLC fluid
  6. Intel: Shell customer story
  7. Castrol newsroom
  8. Dow: contact (headquarters)
  9. Dow: DOWFROST LC 25 product page
  10. Ecolab: global headquarters
  11. Ecolab: coolants for direct liquid cooling
  12. Dynalene: contact
  13. Solutherm: OAT PG heat-transfer fluid
  14. OCP Marketplace listing
  15. Arteco: offices
  16. Arteco: our legacy
  17. Arteco: ZITREC EC launch
  18. Arteco: ZITREC EC product page
  19. NVIDIA: DSX Ready program page (coolant category)
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