Different patching jobs may require stiffer or more fluid mixes.
• Carpet tack strip holes will require a stiffer mix (about 6 oz. of water per 3 lbs. of patching mix).
• Chipped out cracks will require a thinner mix (8 to 10 oz. depending on the width of the crack).
The wider the crack, the less water needed. Cracks of 1/8″ or less should either be left alone or filled with dry patching compound and misted with water.
• Apply with a putty knife to holes leaving the patch material slightly higher than the surrounding surface.
• After approximately 5-8 hours, gently sand it down with #120 grit paper. Use a #180 or #220 grit if the floor is very smooth.
• Chipped out cracks should be filled with a mix that is thin enough to flow into the crack to fill it from the bottom up.
• Fill the crack to within 1/8″ of the surface, let the material cure for 5 to 8 hrs then top with the stiffer patching material leaving it slightly higher than the surface for later sanding.
• Hairline cracks should be filled using dry powder.
• Mound the powder up along the crack then tap along both sides of the crack with a small ball peen or tack hammer until the powder fills the crack without leaving voids.
• Scrape the surface leaving a thin powder residue.
• Spray a fine mist of water until the material is thoroughly moistened with no standing water.
• If shrinkage occurs, add more powder and mist again, sand smooth after 8 hours.
Coverage rates will vary by application.