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Is plaster of Paris the same as joint compound?

Mud and Hot Mud To make a gypsum plaster, manufacturers add cross-linking chemicals to bind the mixture. Without these hardening chemicals, the gypsum paste is called drywall joint compound, or mud -- with them added, the mixture variously becomes patching compound, plaster of Paris or hot mud.

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Correspondingly, how do you repair damaged surface drywall?

Cover the Area with Joint Compound Use a putty knife to spread a thin layer of joint compound (drywall mud) over the area. More than just filling the torn area, drywall mud creates a new surface. Make sure the joint compound extends roughly an inch or so past the edges of the tear. Apply the mud as evenly as possible.

Keeping this in view, how do you prevent pinholes in drywall mud? Add a little bit of water. The further along in the finishing process, the thinner the compound should be. Mix well, even if you add no water. "Work" your mud with a knife in your pan (or on your hawk) for a few seconds. 28 Jan 2014

Keeping this in consideration, what causes pockmarks in drywall mud?

The tiny bubbles, called “pocks,” are trapped air bubbles created because there is a barrier—such as paint or primer or a harder mud, plaster, etc. —that will not let it be absorbed [into the drywall]. Thinning the mud is not better, it's actually worse because it adds more water [that has to evaporate or be absorbed].

Keeping this in view, how do you prevent bubbles in drywall mud?

By Diao

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