An all-purpose, high-performance patching compound formulated to set fast and dry hard. Set time is 5 to 10 minutes and is ready to paint in 30 minutes. Great for all interior wall, ceiling, and floor projects. Interior use. Mixing ratio is 3 parts powder: 1 cold water. 4 lb. bag covers approximately 2 sq. ft. at 1/4" thickness per the mixing ratio.