Phillips 66® Koolkut® Transparent is a high-quality, clear, non-staining cutting oil developed for light- to medium-duty machining of ferrous and some non-ferrous metals, such as mild steel, ductile iron, and aluminum. It is transparent for good visibility of the workpiece during machining operations, and is non-staining to both ferrous and non-ferrous metals.

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Features & Benefits

  • Multipurpose cutting oil for light- to medium-duty machining operations
  • Transparent for good visibility of the machining operation
  • Good anti-weld properties
  • Helps extend cutting tool life
  • Good surface finish
  • Controls heat build-up
  • Protects against rust and corrosion
  • Non-staining to aluminum


  • Koolkut Transparent is recommended for light- to medium-duty machining of ferrous and non-ferrous metals. Typical applications include:
  • Automatic screw machines
  • Drilling
  • High-speed, low feed rate, precision machining
  • Light- to medium-duty machining of ductile iron
  • Sawing
  • Tapping and threading of mild steel
  • Turning

Technical Details

  • ISO Grade: 32
  • Licenses & Approvals


    Additional Details

    ISO Grade 32
    Specific Gravity @ 60°F 0.89
    Density, lbs/gal @ 60°F 7.41
    Color, ASTM D1500 1.5
    Flash Point (COC), °C (°F) 216 (420)
    Pour Point, °C (°F) -21 (-6)
    cSt @ 40°C 30.6
    cSt @ 100°C 5.3
    SUS @ 100°F 158
    SUS @ 210°F 44
    Viscosity Index 105
    Copper Corrosion, ASTM D130 1a
    Chlorine, wt % 1.95
    Fatty Oil, wt % Nil
    Sulfur, Total, wt % 0.08
    Sulfur, Active, wt % Nil
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