Direct liquid cooling fluids
Discover Castrol ON Direct Liquid Cooling for data centres. Reducing downtime and helping increase processing capacity.
Castrol ON: Direct Liquid Cooling PG 25
Demand for computing performance is growing faster than ever. Traditional air cooling can’t keep pace with today’s high-powered chipsets – consuming excessive energy and water whilst adding infrastructure complexity. With cooling responsible for up to 40% of a data centre’s total energy* use, operators need a more efficient way to manage heat at the source. Direct-to-Chip (D2C) liquid cooling meets this challenge, removing heat where it’s generated to improve thermal efficiency and enable higher-performance systems.
Together with our customers and partners, we're helping to redefine the future of data centre and IT performance. Castrol ON Direct Liquid Cooling fluids are designed for Direct-to-Chip systems, proven to deliver reliable heat dissipation. Castrol ON Direct Liquid Cooling PG 25 works to maintain optimal chip temperatures.
By choosing Castrol, data centres can unlock long-term efficiency, and switch ON a smarter future.
Maximum cooling with minimal disruption
Direct-to-Chip cooling is fast becoming the solution of choice for modern data centres. Designed for enterprise and hyperscale environments, it integrates easily into existing systems, making it ideal for retrofits and phased upgrades. Its rapid adoption means operators can apply the technology without the need for a complete infrastructure overhaul.
Low temperature, high performance
The technology circulates coolant through cold plates mounted onto key heat-generating components, such as CPUs and GPUs. By removing heat at the source, Direct-to-Chip cooling enables greater thermal efficiency and supports higher compute densities. Helping operators to boost performance and reduce energy consumption.
- Heated coolant from chip
- Cooling water supply
- Cooling water returns
- Pump
- Cooled coolant to chip
- Microchip
- Liquid-to-liquid heat exchanger
Extended corrosion protection
Helps to deliver advanced protection for metal components within the cooling circuit.
Material compatibility
Developed to be compatible with wetted materials present in liquid cooling systems.
Biostable formulation
Prevents bacterial growth and maintains fluid integrity throughout service life.
Ready to use
Pre-mixed solution requiring no dilution with water for easy application.
Product benefits
- Offers extended protection against metal corrosion
- Compatible with wetted materials present in the cooling system
- Biostable formulation preventing bacterial growth during service
- Ready to use, does not need dilution with water
Application
Castrol ON Direct Liquid Cooling PG 25 is recommended as heat transfer fluid for Direct-to-Chip Cooling, Computer room AC units, Datacom Equipment Center Cooling and Glycol Loop Heat Transfer Exchangers.
Looking for something else?
Direct-to-Chip cooling is an advanced thermal management technology for high-performance computing components. A specially-formulated liquid flows through cold plates mounted onto heat-generating components like CPUs and GPUs. This liquid then absorbs heat at the source and carries it to a heat exchanger – for safe and efficient dissipation.
By removing heat directly from the source, this targeted approach improves thermal efficiency, supports higher compute densities, and lowers energy and water consumption. Its scalability and reliability make it a preferred solution for modern data centres over traditional air-cooling systems. Enabling enhanced performance, reduced operational costs, and improved operational sustainability.