On average, it takes three full days for wet drywall to thoroughly dry. This can vary depending on the extent of the water damage and the humidity in the environment.

Smooth the wet texture with a 10-inch drywall taping knife, starting at the bottom of the wall and lightly pulling upward.

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This guide covers exactly how to remove mold from drywall. ... Once it’s wet you can use a toothbrush or a scrub brush to scrub away any discolorations and mold. 4. Dry.

One common type is Greenboard, with its paper covering coated in wax. It is often used as a backer in potentially damp or moist areas, though it is not a waterproof material as some might suggest.