CGC Sheetrock 20 drywall compound is excellent for embedding tape, bead, and trims. Its special formulation provides a lightweight product with a superior bond, permits same-day joint finishing and is easy to handle. It is ideal for heavy fills and is virtually unaffected by humidity. Once it's dry, after about 15 minutes, sand it down easily for a sleek, elegant finish. With a total coverage of 450 square feet, you can tackle small to medium interior projects. This 11 kilograms bag can be stored for up to 6 months if it is placed in good conditions and closed tightly after each use.