Allied Mineral Products, Inc.
Alsey Refractories Company
BNZ Materials, Inc.
Christy Industrial Holdings
HarbisonWalker International
Mt. Savage Specialty Refractories
The Nock and Son Company
Plibrico Company LLC
Refractory Sales & Service
Reno Refractories, Inc.
RESCO Products
Shinagawa Americas
Vesuvius