1. 3M Company
2. BASF SE
3. Ceramic Fiber Enterprises Inc.
4. CeramSource Inc.
5. CeramTec GmbH
6. FCS Ltd.
7. FibreCast Inc.
8. General Insulation Company
9. Grupo Nutec
S.A. de C.V.
10. HarbisonWalker International
11. Ibiden Co. Ltd.
12. Isolite Insulating Products Co. Ltd.
13. Kundan Refractories
14. Luyang Energy-saving Materials Co. Ltd.
15. M.E. SCHUPP Industriekeramik GmbH
16. Marshall Packings
17. Mineral Seal Corporation
18. Nutec Group SA de CV
19. Pyrotek Inc.
20. Rath-Group
21. Shanghai YESO Insulating Products Co. Ltd.
22. Shree Ceramic Fibers pvt. Ltd.
23. Simond Fibertech Limited
24. Unifrax Holding Co.
25. YESO Insulating Product Co. Ltd