Soluble Coolants

Castrol Syntilo MR 9974 BF

Castrol Syntilo MR 9974 BF Synthetic Coolant


Castrol Syntilo MR 9974 BF is a mineral oil, boron and formaldehyde-releasing agent free synthetic coolant. It contains an additive package that provides good corrosion protection to machine tools and parts.

The fluid also provides excellent product stability which helps to lower the overall operational costs. Syntilo 9974 BF is suitable for large central systems and single sump machines.


Syntilo MR 9974 BF is especially designed as a grinding, honing and heavy-duty machining fluid for ferrous materials


Castrol Syntilo MR 9974 BF Synthetic Coolant Product Advantages:

  • Extended fluid life can help reduce maintenance and downtime
  • Low foam in recommended water conditions (see details below)
  • Rejects tramp oil to the surface of the fluid for easy removal
  • Settles chips quickly to prevent grinding wheel build-up and maintain a clean working environment
  • Formaldehyde-releasing agent, boron and nitrite free which help you to fulfil aspects of legislative requirements and waste treatment requirements where applicable
Mineral oil0
Concentration range3-15%
Metal typeCast Iron, High alloy steel / Stainless steel, Low / Med alloy steel, Other Alloys
Multi metals suitableNo
Formulated without Chlorinated ParaffinYes
Formulated without BoronYes
Product typeMetal Working Fluids
Applicable to these sectorsAerospace, Automotive Manufacture, Machinery, Metal Goods

Recommended Concentrations:

Grinding 4 – 6%
General Machining 4 – 10%
Drilling 6 – 10%
Reaming 6 – 10%
Broaching 10 – 15%
Water range 0 – 400 ppm CaCO3


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 the product safety data sheet.

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Safety Datasheet

Technical Datasheet


Castrol Syntilo 9974 BF metalworking soluble cooling fluids

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