Wood Patch The higher solid content of Wood Patch makes it ideal for large fill areas or for spot filling during sanding. It can also be thinned and used as a Full-Trowel Filler; simply mix 1-2 cups of water per one gallon of Wood Patch, and trowel floor as directed below. Wood Patch is available in 1-gallon, 1-quart and 14-ounce containers, in all 16 colors listed in color chart.