Quikrete Gray Vinyl Concrete Patch, 20 Lb is a commercial grade, polymer-modified concrete repair mortar designed for multipurpose use. It is i for making thin repairs to chipped, cracked, or flaking concrete and masonry surfaces. This patch adheres well to concrete, bricks, block, and stone, and can be troweled to a feather edge of just 1/16 inch. It is important to note that it should not be used in cracks less than 1/8 inch wide or in expansion joints. For deep repairs on vertical surfaces, apply in 1/4 inch layers, allowing a 2-hour drying time between each layer. The product exceeds the compressive strength requirements of ASTM C-387 and comes ready to use with only water added. Coverage for this 20 lb size is approximately 17 square feet at 1/8 inch thickness. The patch is gray in color and packaged in a convenient pail for easy handling. Model Number: 1133-20