Walnut Shells

Walnut Blast Media

8/12 Walnut Shell
12/20 Walnut Shell
30/100 Walnut Shell
-100 Walnut Shell
Raw Walnut Shell

Walnut Blast Media


The term “abrasive media” is most often associated with harder, manmade materials such as steel shot or grit, silicon carbide or aluminum oxide. However, certain metal finishing applications require a softer, less abrasive material that can deliver the desired result without the risk of damage to the substrate surface.

Crushed black walnut shells offer a softer, gentler media blasting alternative to these harsher materials. Specifically intended for use in dry air blasting applications, walnut shells are a lightweight, angular media that will effectively remove topcoats while leaving undercoating intact.

Prior to the introduction of walnut shell media blasting, metal finishers typically had to resort to stripping coatings down to the bare metal and completely replacing the under-coatings and topcoat. Walnut shell blasting eliminates the need for these costly, time-consuming processes.

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Specific walnut shell media blasting applications include:

  • Stripping and cleaning of castings and moldings
  • Deburring plastics and die castings
  • Cleaning of metallic surfaces on automobiles, boats, bridges and buildings
  • Cleanout of aircraft engines and steam turbines
  • Enhancing the porosity of grinding wheel and ceramics in burn-out applications
  • Deflashing electronic components


The benefits of walnut blasting include:


Because walnut blasting is a dry process, it eliminates the need for additional time-consuming drying steps. This will help you keep up with tight production schedules.


Walnut shells are compatible with numerous metal finishing processes, which may prevent the need to purchase multiple types of blasting media.


Walnut shells are a reusable blasting media that will maximize the return on your investment


Organic walnut shells do not produce harmful toxins and require no solvents or additives during the blasting process.

Environmentally Friendly

Walnut shells are biodegradable. You can dispose of them without concerns about harming the environment.

Walnut Blasting Applications

The combination of light weight, angular design and relative softness makes walnut shell blast media an excellent choice for the deburring, cleaning, deflashing or stripping of softer substrates such as plastics, wood, fiberglass, aluminum and various composite materials. The walnut blasting process is compatible with air and wheel blasting as well as tumbling.

Your Source for High-Quality Walnut Blast Media

Finishing Systems offers black walnut shell media in multiple sizes and grits to meet any blasting need. We also offer high-quality walnut shell tumbler media that is the best choice for tumbling applications. You can count on our more than 40 years of experience and expertise to help you select the right media for your specific metal finishing processes.

We complement our walnut shell media offerings with a wide selection of walnut shell blasters and other essential walnut shell blasting equipment. And if you prefer to outsource your metal finishing processes, our state-of-the-art 24,000-square-foot York, PA facility contains the latest blasting and tumbling equipment. We can perform the entire process from start to finish.

Contact Finishing Systems to learn more about our wide range of walnut shell media and walnut blasting and tumbling services today.

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