Henry 345 Premixed Patch n'LEVEL Floor Patch & Smoothing Compound is a ready-to-use flooring patch designed for smoothing and repairing interior and exterior surfaces including concrete, wood, and masonry. This fast-drying premixed formula dries in just 2 to 3 hours, eliminating the need for primers or additives. It can be applied directly to clean, dry wood, while concrete and masonry should be lightly dampened with clean water using a stiff brush or sponge, ensuring no puddles or standing water remain. The product should be stirred if separation occurs and applied from feather edge up to 1 inch thick using a putty knife, broad knife, or trowel. For thicknesses over 1/4 inch, apply in layers, allowing 2 to 3 hours drying time between each. The patch is fully dry when it cannot be indented with the tool handle. Drying times may vary with thicker applications, lower temperatures, and higher humidity. Cleanup is simple with warm water and a damp sponge before the product hardens. Coverage ranges from 4 to 5 square feet per quart at 1/8 inch thickness. Available in 1 quart and 1 gallon tubs, this gray Portland cement-based compound is suitable for both interior and exterior use and has a shelf life of one year. Model Number: 12063