How do you use wood filler for large gaps?

You’ve got a big gap in your woodwork, and you want to fill it with something. You could use spackle, but maybe you want something that’s more like putty.

Or maybe you want to know the difference between putty and filler. Or maybe you just need some tips on how to smooth it all out once the job is done! Well, whatever your question is about wood filler, we’ve got answers here.

How big of a gap can you fill with wood filler?

You can fill gaps no larger than the tube of wood filler. This means that if you have a 1/2-inch gap, it will be impossible to fill with wood filler because the tube is only 1/16-inch wide.

The same goes for holes that are more than half an inch long or deep.

Gaps smaller than that are still challenging but doable!

Can you fill in large gaps in wood with wood filler?

Yes, you can use wood filler to fill large gaps in wood. But you’ll want to use a special type of wood filler called an “expanding” or “stretching” filler (like Minwax’s Fast-Cure Wood Filler).

You may also see these products referred to as gap-filling putty. They’re different from regular putty because they expand when they dry, making them ideal for filling gaps between two pieces of wood that don’t quite fit together perfectly.

How do you fill a 2 inch gap in wood?

If you have a gap that’s 2 inches wide or less, use wood filler. It’s important to use this type of filler instead of other types because it won’t shrink and pull the gaps apart.

Use a putty knife or other flat tool to spread the wood filler into the gap. You can also apply it with your finger if you want but be careful not to get any in places where it shouldn’t go (like on your floors).

Let the wood filler dry before sanding or painting over it!

What to use to fill in large gaps?

For this project, the best thing to use is wood putty. If you have a small gap between boards, and it’s not more than 1/4″, then you can use a sawdust and glue mixture to fill in the gap.

If your gap is wider than that, or if it’s up higher on your wall where paint won’t cover it easily (like around windows), then consider using some epoxy filler.

Epoxy filler does take longer to dry than just about any other type of filler out there, but it fills the holes better too so it will likely be worth the wait!

How do you fill large gaps between wall and trim?

  • Use a putty knife to spread the filler into the gap, then smooth it out with the same tool.
  • Spread out the filler with your putty knife and smooth it until you have an even surface that’s about 1/8 inch thick. If you want to remove any excess wood filler, use a spatula or butter knife instead of spreading it around with your fingers (which will only end up in them).
  • Remove excess from around edges and corners by scraping off what’s left on top of your brush or spatula using your putty knife – this creates less mess as well as keeps everything clean!
  • When done applying and smoothing over large gaps between wall and trim, clean up any remaining mess by scraping off all residue left behind with a damp rag if needed.”

Is it better to use wood filler or caulk?

If you have a small gap, using caulk might be the best option. Caulk is a waterproof sealant that will help to keep rain and other moisture out of your home or business.

If you have large gaps or cracks in your walls, it’s better to use wood filler since caulking can only do so much to fill them up.

How do you smooth wood filler?

Let the wood filler dry for at least 24 hours before you smooth it.

Use a putty knife to smooth out any ridges in the wood filler. If you have a large gap, use long, even strokes with your putty knife to fill in the gap.

Wet a rag and dab it over the wood filler to remove excess water from the surface of your project. This will help create an even finish when you sand down your project later on.

Use a dry cloth to wipe off any dust or debris that may have accumulated during this process (this is especially important if you’re working with oil-based materials).

What is the difference between wood putty and wood filler?

When it comes to wood putty and wood filler, the main difference is their consistency. Wood putty is a softer material than wood filler, which makes it ideal for filling in small gaps between boards or around nails where you don’t want too much material.

The softer consistency of putty also makes it more flexible, so if your project requires flexibility for whatever reason (like bending around curves), this can be helpful.

Wood filler tends to be harder and less flexible than wood putty. It’s meant for larger areas that require more filling capability—for instance, replacing large chunks of missing or damaged wood on furniture with just one product is easier with a hardwood filler than using multiple shades of colored finish coats or stains over time.


We hope that this article has helped you understand more about using wood filler to fill large gaps in your furniture or home. It is a versatile product, which means it can be used for many different projects.

However, we would like to emphasize that it is not just a cosmetic fix; wood filler can also be used to repair wood damaged by water or other liquids.

Photo of author

Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

Leave a Comment