Scrape mold and any other residue from the affected area and clean immediately with the broom, then moisten the affected area with water.

In the bucket, using the wooden pole, mix the stucco, waterproofing liquid and water.

Apply the mixture little by little to the ceiling, being careful not to let it fall to the floor. If it falls, clean it up immediately. Help yourself with the brush to reach the most difficult corners.

Let everything dry for a few hours, then apply the paint of your choice.