Crystalline Silica Panel Members
- 3M
- American Foundry Society
- Badger Mining Corporation
- Fairmont Minerals
- International Diatomite Producers Association
- Specialty Granules, Inc.
- James Hardie Building Products
- Lafarge North America Aggregates and Concrete
- National Industrial Sand Association
- National Stone, Sand & Gravel Association
- Omya, Inc.
- The Refractories Institute
- Unimin Corporation
- U.S. Gypsum Company
- U.S. Silica Company
- Vulcan Materials Company