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Main FeaturesWhite in color, Hydrocal® Brand X-21 Gypsum Cement’s set time can be altered with accelerators or retarders.
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How does USG Hydrocal® X-21 Gypsum Cement allow for further formulation?
The setting time of USG Hydrocal® X-21 Gypsum Cement provides low expansion, which benefits further formulation.