Repair cracks, dents, holes, and more with these tips for using wood filler.

What Is Wood Filler?

Wood filler is a hardening substance used to fill imperfections in wood surfaces.

close up of a wood filler

Credit:Jason Donnelly

The solution often consists of tiny wood fragments suspended in a water- or petroleum-based binder.

Types of Wood Filler

Below are four of the most common wood filler varieties used by DIYers.

Let the filler dry according to the manufacturer’s instructions.

stainable wood filler glue cabinets

Credit: Jason Donnelly

For more sanding control, opt for a higher grit, like 220.

Finish the Material

Finish your DIY wood project as you normally would.

While this can be very handy, getting the color right can also be a little tricky.

wood clamp with hand measuring lumber

Some fillersrequire a darker stainto match a material, while others do better with a lighter stain.

Sometimes, no stain at all results in the best shade.

Keep in mind that water-based fillers must be mixed with water-based stains, while petroleum-based fillers require solvent-based stains.

hand plane being used on carpentry project

Wood filler cannot mend more extensive damage and structural issues, and an alternative repair will be necessary.

For petroleum-based fillers, manufacturers often recommend mineral spirits or other solvents.

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