1. Aeroaggregates of North America LLC
2. Amity Insulation Group Inc.
3. Beerenberg Services AS
4. Dehe Technology Group Co. Ltd.
5. Energocell
6. Glapor Werk Mitterteich GmbH
7. Glavel Inc.
8. GLT Products
9. Jahan Ayegh Pars Co.
10. JGB USA International Inc.
11. Kanthal AB
12. Langfang Chaochen Thermal Insulation Materials Co Ltd
13. MISAPOR AG
14. Ningbo Yoyo Foam Glass Co. Ltd.
15. Owens Corning
16. Pinosklo Cellular Glass
17. Polydros S.A.
18. Refaglass
19. SCHL?SSELBAUER Geomaterials GmbH
20. Stikloporas
21. Summit Brands Inc.
22. Szeco Insulation Technology Co. Ltd.
23. Uusioaines Oy - Foamit
24. Zhejiang Dehe Insulation Technology Co. Ltd.
25. Zhejiang Zhenshen Insulation Technology Corp. Ltd.