Products

USG Corporation TERRA ALBA NO. 1, Calcium Sulfate Dihydrate Filler is a flame-retarding filler. It offers low abrasion to processing equipment and is available in 50 lb. bags or 2,000 semi-bulk from USG’s Southard, Oklahoma plant. USG Terra Alba No. 1 Calcium Sulfate Dihydrate Filler is made by fine grinding and air separating a select, high purity white gypsum containing approximately 20% water of crystallization. Depending upon vapor pressure, relative humidity, loading levels, etc., this water of crystallization, or combined water as it is often called, starts being released as the USG Terra Alba No. 1 Calcium Sulfate Dihydrate Filler is heated above 50 °C. At approximately 180 °C, 75% of the combined water has been released. Water is not totally removed until temperatures exceed 400 °C.

Snow White Calcium Sulfate Filler is made by high temperature calcinations of select, high purity gypsum which is then ground and air separated into a bright, white powder. It is used in a variety of polymeric and cementitious system and is available in 50 lb. bags or 2,000 lb. semi-bulk or bulk from USG’s Southard, Oklahoma plant. USG Snow White Anhydrous Calcium Sulfate Filler offers low abrasion to processing equipment, is resistant to weak acids and has a lower specific gravity than barium sulfate. In addition, it contributes to desired expansion, green strength and controllable set in specialty cement applications.