DAP Fastpatch Patching Compound Powder is used for fast repairs to drywall, plaster walls, and ceilings. Other uses include finishing and repairing drywall seams, filling, leveling, or patching concrete, masonry, and wood. Ideal as floor underlayment. Non-shrinking and strong anchoring for fasteners. Can be filed, drilled, nailed, sculpted, or chiseled. Sets in 30 minutes with no priming needed, which allows for patching and painting in the same day. Easy to mix, apply, and sand. Includes measuring scoop for mix ratio accuracy. Makes up to 2 quarts. Covers 10-12 sq ft at 1/16" thickness, 5-6 sq ft at 1/8" thickness. For interior use only, do not use below 50 degrees Fahrenheit. Meets ASTM (American Society for Testing and Materials) C475.