Walnut Shell
Walnut Shells / Agrashell Products
Black Walnut Shell Grit
English Walnut Shell Grit & Flour
Pecan Shell Grit & Flour
Apricot Shell Grit
Composition Materials pioneered walnut shell abrasive blasting with the US Navy in the 1950's. Aircraft carriers and submarines were stripped of only their top coats, leaving the expensive undercoats undisturbed. Prior to the introduction of walnut shell blasting, coatings were removed down to bare metal requiring the replacement of the undercoat, the vinyl coat, and the top coat. The idea of SELECTIVE COATING REMOVAL with walnut shells originated here and saved the Navy both time & money.
With our partner SHELLPRO's acquisition of Agrashell in 2002, they became the largest manufacturer of walnut shell products and we became the largest supplier of walnut shells in the world. Our consulting service is available to you regarding the use of Walnut Shell Grit, Plasti-Grit, or other members of our SOFT ABRASIVE family of products.
The following are our standard grades for walnut shell blasting.
Walnut Shell Grit
(Black and English)
- AD-1B (6/10)
- AD-2.5B (8/12)
- AD-3B (12/20)
- AD-4B (14/30)
- AD-6B (18/40)
- AD-7B (35/60)
- AD-9B (40/100)
- AD-10.5B (60/200)
We started business in 1923 with a line of Fillers & Extenders. Walnut Shell Flour has many attributes which recommend it as a filler for adhesives and plastics compounding. Filler grades include the following.
Walnut Shell Flour
- WF-3 (-100)
- WF-5 (-200)
- WF-7 (-325)
- WF-9 (-400)
The Cosmetics industry has adopted the use of Walnut Shell Grits and Flours in the manufacture of high quality facial scrubs, soaps, and creams. We are the premier manufacturer of the quality Walnut Shell products required for this demanding industry. The following are our special grades for this industry.
Cosmetic Walnut Shell Grades
- AD-7 Cosmetic
- AD-9 Cosmetic
- AD-10.5 Cosmetic
Typical Properties of Walnut Shell
| Specific Gravity | 1.35 |
| Bulk Density (lbs./ft3) | 40 |
| Ph Value at 25°C (in water) | 5 |
| Free Moisture (80° for 15 hrs.) | 2-8% |
| Flash Point (closed cup) | 380°F |
| Oil Absorption | 55-60% |
| Ash Content | 0.5% |
