Wood filler is a handy product that can be used to repair holes and smooth surfaces in wood. Holes can be caused by a range of things such as the grain, or finishing nails that need to be concealed. Wood filler is also helpful for patching up large damages and inconsistencies in wood surfaces, but when filling large areas, it is recommended to apply an opaque finish to avoid any unflattering properties in the final project.

The composition of wood filler typically contains a binding agent and a filling substance, and it can come in various forms. Professional-grade wood fillers are often in the form of putty, providing an easier application and color options that can match the project’s wood for a seamless finish. Some woodworkers still use an old technique for creating wood filler by mixing sawdust from the project with wood glue, producing a simple filler that naturally matches the wood’s color and properties.