Plaster of Paris is ideal for filling holes in interior plaster ceilings and walls, creating a professional quality repair | Plaster powder is also great for crafts like mold making, casting sculpted figures, and other hobby and craft applications | Product sets hard in 20 to 30 minutes for a quick and easy repair, wash tools immediately after use | Smooth, bubble-free formula is non-shrinking, creating a result that lasts | Plaster wall patch is easy to sand and can be painted with any oil or latex based paint when dry