ZAR Red Oak Wood Patch ZAR Trowelable Red Oak Wood Patch is a low odor, ready-to-use, full trowel latex patching compound for interior use only. Fills nail holes, repairs cracks, gouges, broken corners and minor blemishes on wood surfaces. Stainable, easy to clean and may be sanded, sawed or drilled. LATEX Patching Compound Ready-To-Use ZAR Red Oak Wood Patch Features & Benefits Fills open-grain and nail holes. Repairs cracks and gouges on wood surfaces. May be sanded, nailed, sawed, drilled, will take paint, varnish, shellac, polyurethanes and stain.