USG Sheetrock Ultra Lightweight Joint Compound Is Ready-Mixed, High Performance, All Purpose Compound Provides Superior Quality, It Weighs Up To 40% Less Than Conventional Weight Compound, Provides Enhanced Application Properties And Easy To Sand. A Special Formula Makes It Ideal For Embedding Tape, Filling, Leveling And Finishing Over Gypsum And Panel Joints, Fasteners, Bead And Trim. Compound Is Preferred For Consistently High Quality Work. Superior Formulations Are Premixed To Creamy, Smooth Consistency And Are Essentially Free Of Crater-Causing Air Bubbles. Applicable By Hand Or Machine-Tool Applications And Offer Excellent Slip, Bond And Easy Workability.