and water. Plaster of Paris and gypsum both contain calcium sulfate. When the two are mixed, the reaction between the acid and the plaster results in a softer, slower-drying consistency of the ...
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The Family Handyman on MSNWhat Is Joint Compound and How Do You Choose the Right One?It is a mix of gypsum powder and water that turns into this smooth, paste-like substance. You slap it on with a trowel or ...
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