Description Drywall mud. For smooth, high quality finishing of gypsum panel joints, for embedding reinforcing tape, nailheads and metal corner beads. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov