The Blasting & Polishing Material That Cleans and Refines

Renewable
Renewable
Affordable
Affordable
Sustainable
Sustainable

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For a free sample kit of our in-stock walnut shell, just submit your info below.

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Eco-Shell FAQs

Learn the answers to some of the most common questions we receive about using walnut shells for a variety of industries.

We grow and process English walnut shells at our local California farms.

Yes, we have years of experience shipping globally. Contact us for more information.

All our shells come from local California farms and are grown to meet the highest standards in the country.

We generally recommend our 18/40 size option for car restoration. Please contact us for specific use cases.

This is dependent on the amount of old finish that needs to be removed or the final desired surface. Contact us and we can recommend the appropriate grade size option for your specific need.

It depends on the type of rust. Walnut shells will remove surface rust, but they do not profile and will not fully remove pitted rust.

Yes, walnut shells are a soft abrasive that can be used on precious metals.

Have a Project Walnut Shells May Be a Fit For?

Our In-Stock Blasting & Polishing Size Options

Our sizes are based on U.S sieve standards. Millimeter and inch measurements are approximate.

Download Our Applications & Industries Sizing Sheet

4/6

3.35 mm 0 4.75 mm
0.1320 in – 0.1870 in

6/10

2.00 mm – 3.35 mm
0.0787 in – 0.1320 in

6/20

0.85 mm – 3.35 mm
0.0331 in – 0.1320 in

8/12

1.70 mm – 2.36 mm
0.0661 in – 0.0937 in

12/20

0.85 mm – 1.70 mm
0.0331 in – 0.0661 in

14/30

1.40 mm – 0.66 mm
0.0234 in – 0.0555 in

18/40

0.425 mm – 1.00 mm
0.0165 in – 0.0394 in

20/40

0.425 mm – 0.85 mm
0.0165 in – 0.0331 in

35/60

0.25 mm – 0.50 mm
0.0098 in – 0.0197 in

40/60

0.25 mm – 0.425 mm
0.0098 in – 0.0165 in

40/100

0.15 mm – 0.425 mm
0.0059 in – 0.0165 in

60/100

0.150 mm – 0.25 mm
0.0059 in – 0.0098 in

-100

95% passing 100
.150 mm, .0059 in

-200

.75mm, .0029in
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