Henry 345 Premixed Patch n'LEVEL Floor Patch Smoothing Compound Ready-to-use flooring patch for smoothing and repairing interior and exterior concrete, wood, and masonry. Fast drying premixed formula dries in only 2 to 3 hours. No primers or additives needed. Apply directly to clean, dry wood. Lightly dampen concrete and masonry using clean water and a stiff brush or sponge. Do not leave puddles or standing water. Open, stir if product separation has occurred, and apply product from feather edge to 1 In. maximum using a putty knife, broad knife, or trowel. If applying thicker than 1/4 In., apply in 1/4 In. layers and allow 2 to 3 hours drying between layers. Patch is dry when it cannot be indented with the tool handle. Thick applications, low temperatures, and high humidity require longer drying times. Clean up with warm water and a damp sponge before product hardens. Coverage 4 to 5 Sq. Ft. per quart at 1/8 In. thickness. Container Size 1 Gal., Color Gray, Formulation Portland Cement, Color Family Grays, Dry Time 2 To 3 Hrs., Approx. Coverage 16 To 20 Sq. Ft., Interior/Exterior Interior/Exterior, Clean-Up Water, Shelf Life 1 Yr., Pkg Qty 1, Package Type Tub This product contains a chemical known to the State of California to cause cancer.