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Special Series

CBN Stropping Paste


Micron Grit



CBN Compound is a very effective method of honing and polishing the cutting edge of the knife. CBN (Cubic Boron Nitride) is the second hardest material after diamond.

CBN's qualities include its high levels of high hardness, strength, abrasion resistance, and thermal and chemical resistance. These characteristics exceed the values of synthetic diamonds and conventional abrasives such as silicon carbide and aluminum oxide. In particular, CBN's high thermal stability and chemical resistance make it suitable for sharpening in conditions where synthetic diamonds are not normally employed.


  • Product size: 40 x 40 x 55 mm (1½" x 1½" x 2⅛")
  • Weight: 40 g (1.4 oz)
  • Shipping weight: 52 g (1.8 oz)
  • CBN carat weight: 4 carat
  • Form: paste
  • Package: screw cap plastic container

How to use

CBN Compound can be used with any strop made of smooth or coarse leather, balsa or felt. Smooth leather is the best strop material for CBN compound.

CBN Compound does not require any preparations. However, you can experience difficulty taking the compound from the container if your air temperature is below 20°C (68°F). In such a case, you can slightly warm the compound to make it molten. Take a small amount of compound and evenly distribute it to the surface of the strop.

You will not be able to fully remove the compound after applying it to the strop. If you want to use your strop both with and without compound, you must, therefore, keep one side clean. If you want to switch between one compound and another, consider buying an extra strop.

Compound residue accumulates in the leather during stropping. If stropping performance gets worse, remove the residue with a knife spine or special tool, and apply the fresh compound.

Questions and answers

If you have a question regarding this product, please feel free to ask.

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