Page Directory
PUMICE (Non-crystalline silica GRADES)
A few of the consumer products that use Hess Pumice as a key ingredient.
Our standard pumice particle sizes (click to enlarge).
Typically packaged in multi-wall paper bags to assure the pumice stays clean and dry, our pumice is also available in plastic pails, fiber drums and bulk bags. We will also ship in bulk quantities by railcars or truck.
Our high-purity, non-crystalline silica (NCS) ultrafine products are an exceptional fit for a multitude of filler applications, including paints, industrial coatings, plastics and rubber.
Lab Samples Available Upon Request
Contact us at 1-208-766-4777 to discuss your needs and/or to request a sample of the brightest and hardest amorphous aluminum silica commericially available in the world.
Downloads
Chemical Analysis Test Data (PDF)
RoHS Compliance Test Results-Processed Grades (PDF)
RoHS Compliance Test Results-NCS Grades (PDF)
Material Safety Data Sheets:
PUMICE GRADES AND TYPES
Hess Pumice Offers Processed, Mine-grade and Non-Crystalline Silica (NCS) Pumice Products to Industry
Our modern processing plants and continually-tested product produce a pumice grade to fit any application. If the standard grades listed below don't fit your needs, we'll work up a custom grade to meet your specifications.
Our Non-Crystalline Silica product (an Amorphous Aluminum Silicate) was developed in response to environmental and health concerns with CS and provides an effective replacement for CS, Minex and SafSil in industrial coatings, paints, stains, rubber compounds, plastics and fiberglass.
Pumice (Processed Grades)
| Standard Grade |
Weight per Bag (lbs) |
Bags per Pallet |
Pallet Weight (lbs) |
| -325 | 45 | 48 | 2160 |
| FFFF | 45 | 48 | 2160 |
| FFF | 45 | 48 | 2160 |
| FF | 45 | 48 | 2160 |
| F | 50 | 48 | 2400 |
| 1/0 | 45 | 48 | 2160 |
| 2/0 | 45 | 48 | 2160 |
| 3/0 | 45 | 48 | 2160 |
| 0 | 50 | 48 | 2400 |
| 0 1/2 | 45 | 48 | 2160 |
| 0 3/4 | 45 | 48 | 2160 |
| 1/2 | 45 | 48 | 2160 |
| 1 - 1/2 | 45 | 48 | 2160 |
| 2 | 40 | 48 | 1920 |
| 3 | 40 | 48 | 1920 |
| 4 | 40 | 48 | 1920 |
| 5 | 35 | 54 | 1890 |
| 7 | 35 | 54 | 1890 |
| 10 | 35 | 54 | 1890 |
| 5/16C | 75 | 24 | 1800 |
| 1" - 3/4" | 75 | 24 | 1800 |
| 1" - 3/4" | 75 | 24 | 1800 |
Pumice (Mine Grades)
| Grade | Approximate Unit Weight) | Notes: |
| 1" - 3/4" | 1300 lbs/CY | 1) All Mine products are sold on a per-ton basis. 2) Loading hours are Monday through Friday 8:30 AM - 3:30 PM. 3) Pumice, on a per ton basis, will yield approximately 2.3 times the volume of Sand or Gravel. 4) All products can be loaded bulk in trucks or rail cars. 5) Call 1-800-767-4701 for additional information. |
| 3/4" x 3/8" | 1300 lbs/CY | |
| 7/16" | 1550 lbs/CY | |
| 3/8 x #8 | 1400 lbs/CY | |
| 3/8" | 1550 lbs/CY | |
| 1/8" | 1600 lbs/CY | |
| Pit Run 6" | 1550 lbs/CY |
Pumice (NCS Grades)
| Grade | Weight per Bag (kg) |
Bags per Pallet |
Pallet Weight (kg) |
| NCS-3 | 20 | 48 | 960 |
| NCS-3 | 25 | 42 | 1050 |
| NCS-3 | 500 | 2 | 1000 |
| - | |||
| NCS-5 | 20 | 48 | 960 |
| NCS-5 | 25 | 42 | 1050 |
| NCS-5 | 500 | 2 | 1000 |
| - | |||
| NCS-8 | 20 | 48 | 960 |
| NCS-8 | 25 | 42 | 1050 | >
| NCS-8 | 500 | 2 | 1000 |
| - | |||
| NCS-10 | 20 | 48 | 960 |
| NCS-10 | 25 | 42 | 1050 |
| NCS-10 | 500 | 2 | 1000 |
| - | |||
| NCS-12 | 20 | 48 | 960 |
| NCS-12 | 25 | 42 | 1050 |
| NCS-12 | 500 | 2 | 1000 |
| - | |||
| NCS-15 | 20 | 48 | 960 |
| NCS-15 | 25 | 42 | 1050 |
| NCS-15 | 500 | 2 | 1000 |
| - | |||
| NCS-20 | 20 | 48 | 960 |
| NCS-20 | 25 | 42 | 1050 |
| NCS-20 | 500 | 2 | 1000 |
