Ruco Sure Sand Set Type Joint Compound is a non-asbestos, powder formulation for embedding drywall tape reinforcement, fasteners, metal comer beads and drywall trims over wallboard. Set Type Joint Compounds may also be used for filling, leveling and finishing coats, and skim-coating entire wallboard surfaces. Sure Sand is available in 5, 20, 45, 90, 120, 210, and 300 minute set times.