Fill Material for Elastomers, Plastics & Laminates

Product Announcement from Eco-Shell, Inc.

Fill Material for Elastomers, Plastics & Laminates-Image

Eco-Shell, Inc. produces over 30 grades of processed walnut shell. Flour grades include the U.S. Sieve sizes -100, -200 & -325. A high speed mill is used to manufacture their flour grades. Particle analysis is measured by precise air-classification equipment.

The most common applications for Eco-Shell's Flour Grades of Media are:

  • Fill Material for Elastomers, Plastics, Laminates & much more
  • Extender/Filler for Coatings, Glues & Adhesives
  • Polishing Glass, Metal & Ceramics
  • Cosmetics
  • Packing Material for Explosives & Pyrotechnics
  • Insulation / Sound Dampening

At Eco-Shell, Inc. they believe in never limiting the applications and industries in which walnut shell can be used. They offer custom grinding and samples are available for research and development projects. They work directly with organizations and assist where they can to discover new uses for this amazing by-product.

Dual Screen Aggregates have the following characteristics:

  • pH VALUE AT 25°C (IN WATER): 4 - 6
  • FREE MOISTURE (80°C FOR 15HRS): 3 - 5%
  • BULK MODULUS (PSI): 21,000+
    • -100 - 28 Lbs. per Cubic Foot
    • -200 - 28 Lbs. per Cubic Foot
    • -325 - 27 Lbs. per Cubic Foot

Chemical Analysis:

  • Nitrogen - 0.10
  • Cellulose - 40/60
  • Lignin - 20/30
  • Toluene Solubility - 0.5/1.0
  • Methoxyl - 6.5
  • Chlorine - 0.10
  • Ash - 1.5
  • Cutin - 1.0


Advantages of Ground Walnut Shell

Safety/Environmentally Sound
Non-toxic and biodegradable
Requires no flammable solvents
Dust free
Natural product
Use required on most U.S. Government contracts
Found not to cause Silicosis (can occur from use of sand or silica products)

Cost Effective
Cleans without leaving scratches or pitting
Cleaned parts require no additional machining or fitting
Cleans precision parts without a change in dimensions
Pollution prevention


Surface areas require no drying time
Easy to use
Fast clean up after use
Easy disposal process

Elasticity and Durability

Resistant to rupture and deformation
Limited breakdown
Can be re-used in various applications

Premier Grinders of Walnut Shell

An incredibly versatile by-product

English Walnut Shell Media

Precisely processed to your application

About Eco-Shell:

An incredibly versatile by-product
English Walnut Shell Media
Precisely processed to your application

About Eco-Shell:
The Eco-Shell Facility is located in the Northern end of the Sacramento Valley. This location allows us an abundant supply of raw material, cost effective production and storage capabilities. Our plant is outfitted with specialized equipment and utilizes unique processes to create multiple refined grades of English Walnut Shell Media suitable for a constantly growing list of industries and applications. Our understanding of this raw material and commitment to developing a variety of media that suits the application has established Eco-Shell as The Industry Leader.

Eco-Shell produces well over 30 different standard media sizes. When custom sizing is required our staff works directly with your research and development to ensure we engineer a media that meets your specification. Once you approve the specification, your orders are filled accurately and in a timely manner. We have a wide array of packaging options and our products are delivered by ship, rail, air & ground, worldwide. Our network of distributors continues to grow. Our products are now available in Germany, Holland, Denmark, Sweden, The United Kingdom, South Korea, Japan, Canada and The United States.


Ground walnuts shells are a type of abrasive blast media used for cleaning. Typical substrates are metals, fiberglass, woods, plastics and stone. The walnut shells are ground to various sizes from coarse to extra fine depending on the application. The walnut shells are used in the same manner as typical blast media. Walnut shells are durable and can be re-used in many applications. Walnut shells can remove matter from surfaces without scratching or pitting underlying material.

Walnut shell is biodegradable, non-toxic, environmentally safe and cost effective for blasting. Walnut shell does not cause silicosis.


Walnut shells are used in many polishing and/or deburring applications. Walnut shell media is used for polishing or cleaning fine metals, alloys, mechanical parts, shell cartridges, eye glass lens, rocks, stones, coral, ivory, beans, and seeds.

Jewelers use walnut shell media treated with rouge in both tumbling and vibratory applications for polishing gems and fine jewelry.

When polishing the media size should be small enough to freely pass through openings or large enough to avoid lodging in openings or crevices.


The cosmetic industry uses walnut shell media as an exfoliate in facial, body and foot scrubs. Walnut shell is used by many, from the novice soap maker to the commercially distributed cosmetic lines. Eco-Shell will aid in formulating the custom grit sizes desired.


Walnut shell is used in many applications as a filler or extender. Paint and coating materials, resins, pigments, plywood, adhesives, ceramics, dynamite, tile and livestock feed just to name a few. Media sizes vary from coarse walnut shell to walnut shell flour.


Walnut shell is an all natural safe biodegradable bedding for birds, reptiles and small animals. Since walnut shell is non-absorbent it does not allow for growth of bacteria's and molds. Walnut shell is dust free, easy to dispose of and can be used in composting. A clean cage makes for a happier pet.

Oil Industry

Walnut shell is used as lost circulation material to combat typical operational problems associated with drilling mud losses. Walnut shell is an easy and efficient solution to lost circulation problems. Walnut shell does not significantly change mud properties and can be removed and perhaps recycled with ease. Walnut shell is available in coarse, medium and fin grit sizes.


Custom Processing

Eco-Shell has state of the art equipment and a staff that is willing to participate in developing new ideas and applications. If you have special requests or requirements, please contact the sales staff, we will gladly partner in these new developments. Our philosophy here at Eco-Shell is to find the needs of a vastly renewable resource - Ground walnut shell.


Material Safety Data Sheet
May be used to comply with OSHA'S Hazard Communication Standard, 29CRF1910.1200. Standard must be consulted for specific requirements.


ASTM Specification E-11

Media Sizes

Inventoried Media Sizes

Custom sizes available upon request. Please contact our sales staff at