Wood Filler

To get the best results with Wood Filler, you need to start with a clean, dry surface. Use a screwdriver or a stiff brush to scrape out any loose splinters or old finish from the crack or gouge. When you apply the filler, we suggest using a flexible putty knife to press the material firmly into the void, ensuring there are no air pockets left behind. It is a smart move to “overfill” the hole slightly, leaving a small mound of filler above the surface. Since most fillers shrink as the moisture evaporates, this extra bit ensures that once it dries, you aren’t left with a concave dip that needs a second application.

The primary difference comes down to whether the product hardens or stays flexible. Wood Filler is typically water or solvent-based and is designed to dry into a rock-hard, sandable surface. This makes it the go-to for raw wood repairs where you need to fill a hole before you do your final sanding and staining. On the other hand, wood putty is an oil-based, non-hardening substance that remains pliable long after application. It’s meant for “beauty” touch-ups on projects that are already finished, like filling a tiny nail hole in a piece of crown molding. Because it never truly dries out, it can handle the slight expansion of the wood, but you should never try to sand it or paint over it.

Achieving a natural look with stained Wood Filler usually requires a bit of professional trickery. Since store-bought fillers can be stubborn, many builders prefer to make a “custom” filler by mixing fine sanding dust from the actual project with a clear wood glue. This ensures the material in the hole is the same species as the rest of the wood, which helps it react more realistically to the stain. If you are using a commercial product, applying a pre-stain conditioner can help even out the absorption between the porous wood and the denser filler. Always remember that “stainable” means it will take color, not that it will be a perfect match, so don’t be afraid to use multiple thin coats of stain to get the blend just right.