USG Terra Alba No. 1

The dihydrate form of calcium sulfate used in low temperature thermoset plastic and specialty cement applications.

Often used as a flame-retarding filler when processed at room temperature.

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1-800-950-3839
7 a.m. - 6 p.m. CT, Mon - Fri

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1-800-USG4YOU (1-800-874-4968)
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features and benefits

USG Terra Alba No. 1 is a dihydrate form of calcium sulfate produced by fine grinding and air-separating high-purity, white gypsum containing 20% water of crystallization.  It releases combined water as it is heated above 50°C, releasing 75% of water as temperatures reach 180°C (only when temperatures exceed 400°C is water totally removed). USG Terra Alba No. 1:

  • Can be used as a flame-retarding filler when processed at room temperature
  • Contributes to desired expansion, green strength and controlled set in specialty cement applications
  • Is a relatively soft material (2-3 Mohs scale hardness) contributing to minimal wear on equipment.

Customer Service Center
1-800-950-3839
7 a.m. - 6 p.m. CT, Mon - Fri

USG4YOU Tech Support
1-800-USG4YOU (1-800-874-4968)
7:30 a.m. - 4 p.m. CT, Mon - Fri

Email USG Technical Support

Design & Specification
Assistance
Find your local architectural representative

Frequently Asked Questions