These compounds are ideal for heavy fills and they sand easily, allowing fast, smooth finishing. USG Sheetrock Brand Easy Sand joint compound can be used for a variety of applications including filling, smoothing and finishing interior concrete ceilings and above-grade concrete, taping and finishing panels in bathroom areas and finishing joints in protected exterior soffits. 18 lbs. size90 minute working timeFor one-day patching and joint finishing and next-day decorationWeighs up to 25 percent less than conventional setting-type compoundsEasy to sandProvides low shrinkage and a superior bond