What surfaces can you put drywall mud?

Drywall mud, or joint compound, can be applied to a variety of surfaces including drywall, plaster, wood, and some types of masonry. It is primarily designed for use on drywall seams and repairs but can also be used for texturing and finishing other surfaces. However, for optimal adhesion, surfaces should be clean, dry, and free of contaminants. In some cases, a primer or bonding agent may be necessary for non-traditional surfaces.