Castrol Hysol SL 50 XBB

Castrol Hysol SL 50 XBB is a high-performance soluble metalworking fluid formulated with Castrol’s advanced XBB technology to deliver exceptional machining performance, stability, and environmental compliance.
Free from boron, biocides, and formaldehyde-releasing agents, it is designed to help manufacturers meet modern waste management and health regulations without compromising on quality or productivity.

This innovative formulation offers excellent fluid stability, enhanced surface finish, and extended operational life, helping reduce overall maintenance and running costs across a range of machining operations.

Optimised Performance and Clean Machining

The advanced additive system in Castrol Hysol SL 50 XBB provides superior lubricity and cooling, ensuring smoother cutting, longer tool life, and improved surface finish.
Its excellent wetting properties help minimise coolant drag-out, keeping both machine tools and components cleaner, while reducing product waste.

With low foam characteristics under recommended water conditions, Hysol SL 50 XBB performs reliably in high-speed and high-pressure systems, ensuring consistency and operational efficiency in demanding environments.

Why Choose Castrol Hysol SL 50 XBB?

Castrol Hysol SL 50 XBB delivers the perfect combination of performance, reliability, and environmental responsibility.
Its biocide- and boron-free formulation supports sustainable manufacturing while ensuring long-lasting fluid stability, excellent corrosion protection, and outstanding machining precision.

With Castrol’s XBB technology, this fluid helps reduce operational costs, minimise waste, and maintain cleaner machines — all while achieving consistently high-quality machining results across diverse applications.

Castrol Hysol SL 50 XBB is suitable for use in both large central systems and single sump machines, offering flexibility for operations of all sizes.
It is ideal for machining a variety of ferrous and non-ferrous metals, including aluminium and its alloys, making it an excellent choice for aerospace, automotive, and general engineering applications.

Thanks to its versatility and long fluid life, Hysol SL 50 XBB allows for product consolidation, simplifying coolant management and reducing overall inventory requirements.

Castrol Hysol SL 50 XBB High-Performance Soluble Metalworking Fluid Advantages:

• Free from boron, biocides, and formaldehyde-releasing agents – supports compliance with modern waste treatment and safety regulations.

• Extended fluid life – provides long-term stability, reducing maintenance frequency and machine downtime.

• Low-foam formulation – ensures reliable performance in high-speed, high-pressure machining operations.

• Excellent wetting and cleaning properties – help reduce coolant carry-off and keep machines and components cleaner.

• Versatile across materials and applications – suitable for a wide range of metals, offering opportunities for product consolidation and simplified system management.

• Environmentally conscious formulation – designed to meet current and future industrial waste management requirements.

Recommended Concentrations:

Grinding 5-7%
General Machining 5-8%
Drilling 6-8%
Reaming and tapping 7-10%
Broaching 8-10%
Water range 100-1000 ppm CaCO3

Suggested Storage:

To avoid product deterioration always keep the container/drum tightly sealed. Store the product in a cool, dry place away from direct sunlight. Prevent exposure to frost and avoid water ingress. For optimum product stability, it is preferable to store the product indoors between 5°C and 45 °C / 41°F and 113°F.
For more details, please refer to the product safety data sheet.

Download Technical Data Sheet

Download Safety Data Sheet

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