Castrol Alusol SL 41 XBB
01736 757002Castrol Alusol SL 41 XBB High Performance Soluble Metalworking Fluid
Castrol Alusol SL 41 XBB is a premium soluble metalworking fluid engineered for outstanding machining performance, excellent surface finish, and long-lasting fluid stability.
This advanced formulation is free from boron, chlorine, and formaldehyde-releasing agents, helping manufacturers meet modern environmental and waste management regulations with confidence.
Developed using Castrol’s proven XBB technology, Alusol SL 41 XBB offers exceptional resistance to bacterial growth and maintains stable pH levels for consistent fluid performance.
As a result, it helps extend fluid life, reduce maintenance requirements, and lower overall operational costs.
Reliable Performance and Smooth Machining
The advanced additive package in Castrol Alusol SL 41 XBB provides superior lubricity, ensuring smoother cutting and longer tool life.
It helps deliver a clean, bright surface finish, particularly when machining aluminium and non-ferrous alloys, making it ideal for high-precision manufacturing environments.
In addition, its low-foam characteristics make it well-suited for use in modern high-speed and high-pressure systems, even under varied water conditions.
Why Choose Castrol Alusol SL 41 XBB?
Choosing Castrol Alusol SL 41 XBB means choosing a high-efficiency, long-life cutting fluid that delivers clean, stable, and cost-effective performance.
Its environmentally responsible formulation helps you stay compliant while improving machining precision and productivity.
With proven reliability and compatibility across a wide range of materials, Castrol Alusol SL 41 XBB is the smart solution for modern manufacturers who want consistent results, cleaner systems, and reduced operational costs.
Castrol Alusol SL 41 XBB is designed for use in both large central systems and single-sump machines, offering flexibility across different production setups.
It is especially recommended for machining aluminium and its alloys, but it can also be used effectively on ferrous metals, making it a versatile choice for mixed-material operations.
Whether you are machining components for the aerospace, automotive, or general engineering sectors, Alusol SL 41 XBB delivers consistent, reliable performance every time.
Castrol Alusol SL 41 XBB Applications
| Cast Iron | Low-Medium alloyed steel | High-medium alloyed steel | Aluminium alloys | Magnesium alloys | Yellow Metals | |
| Grinding | X | X | X | X | ||
| Milling, turning (general machining) | X | XX | XX | XX | X | |
| Drilling | X | XX | X | XX | X | |
| Reaming, tapping | X | XX | X | XX | X | |
| Broaching | X | XX | X |
XX suggested core application
X possible application, please consult a Castrol representative prior to use
Castrol Alusol SL 41 XBB Lubricant Advantages:
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Boron-, chlorine-, and formaldehyde-releasing agent-free supports compliance with strict environmental and waste disposal regulations.
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Extended fluid life – stable chemistry and bacterial resistance help reduce downtime and maintenance costs.
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Low foam in a wide range of water conditions – ensures smooth and trouble-free operation in modern machining systems.
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Enhanced lubrication performance – improves tool life and surface finish, especially during aluminium machining.
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Excellent wetting and cleaning properties – minimises coolant drag-out, helping maintain cleaner machines and components.
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Versatile and efficient – suitable for multiple metals and machining operations, allowing for potential product consolidation and simplified inventory.
| Mineral oil | 53 |
|---|---|
| Concentration range | 7-10% |
| Metal type | Aluminum, Cast Iron, High alloy steel / Stainless steel, Low / Med alloy steel, Yellow Metal |
| Multi metals suitable | Yes |
| Ester/EP additives | Yes |
| Formulated without Chlorinated Paraffin | Yes |
| Formulated without Boron | Yes |
| Product type | Metal Working Fluids |
| Applicable to these sectors | Automotive Manufacture, Machinery, Metal Goods |
Recommended Concentrations:
Grinding 7-8%
General Machining 7-10%
Drilling 7-10%
Reaming and tapping 8-10%
Broaching 8-10%
Water range 100-800 ppm CaCO3
To avoid product deterioration, always keep the container/drum tightly sealed. For optimum product stability, store between 5°C/41°F and 45°C/113°F in a cool, dry place away from direct sunlight. Prevent exposure to frost and avoid water ingress. It is preferable to store Castrol Alusol SL 51 XBB indoors.
For more details, please refer to the product safety data sheet.
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