Full-Trowel Filler is thinner than Wood Patch, designed to spread across the surface of the wood floor. With a workable puddle, just trowel the floor, going back and forth across the cracks and voids to ensure deep penetration. Be sure and fill from the bottom up, removing excess filler as you go. A 3.5-gallon bucket fills up to 3,000 square feet. Available in a 3.5-gallon and 1-gallon bucket, For indoor use only.