Up to 40% lighter than conventional-weight joint compound. Provides overall high performance, as well as superior working qualities and good open time. Special latex formulation is for embedding Sheetrock paper joint tape and for filling, leveling and finishing over gypsum panel joints, fasteners, bead and trim. Delivers a tough , yet sands easily. Easier flow and less effort during application. Flexible enough to use with hand tools or mechanical finishing equipment. Ready mixed. Coverage: (2) 4.5 Gal. (gallon) pails finishes 1000 Sq. Ft. (square foot) gypsum wallboard.