G.P. Gypsum. ( Georgia Pacific) USA
USG ( United States Gypsum USA
BPB (British Plasterboard) USA
National Gypsum Company USA
Lafarge USA
Temple Gypsum USA
Federal Gypsum Company Canada
Canadian Gypsum Canada
CSR Australia
Winstone Wallboard New Zealand
El Volcan Chili
Petrojaya Boral Indonesia
Boral Lafarge Malaysia
Gyptech SA Colombia
Panel Rey Mexico
Korean Gypsum Korea
Kuwait Gypsum Kuwait
Spanish Gypsum Spain