Plus 3. Eliminates the need for separate taping and topping compounds. Bonds like taping compound and sands like a topping compound. Weighs 35% less than conventional compounds and requires only 2 coats over metal fasteners, corner bead, and trim. Plus 3 offers lower shrinkage, faster drying, easier sanding, and mixes quicker than conventional compounds. Protect from freezing. Coverage: Approximately 9.4 gallons per 1000 sq. ft. of gypsum panels.