The Best Wood Crack Filler

brian forbes westfarthing woodworks author biography about me experience

This is The Best wood Crack Filler, your guide to filling cracks in wood with a permanent, durable, and worry free single product application. Enjoy.

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Filling Cracks in Your Wooden Projects

The-Best-Wood-Crack-FillerEvery now and then in woodworking you’ll find yourself face with a situation where you have a crack in a board and you need to fill it. This can be in a piece of material that you are thinking about using, or it might even be in your finished project.

In either case, a crack presents itself with a little more of an issue than just filling a void. A crack is a natural breaking point in a piece of wood, so you need to plan on that crack getting larger over time.

Thankfully, there is a super simple way to fill a wood crack with a method that will help keep it from getting bigger. This is the best solution, because it keeps the crack from resurfacing later on down the road.

See Also: 19 Things I Wish I Knew When I Started Woodworking

The Best Crack Filler for Wood

The absolute best material that you can use for a crack filler in a piece of wood or a woodworking project is two part epoxy. This is a common adhesive in woodworking, and you might even already have some in your shop.

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The reason it’s the best at filling cracks is because not only does it provide filler material for the void, but it also provides an adhesive grip to hold the pieces together. This prevents future cracking, which is common in natural wood cracks.

It’s like filling your defect with the best of both worlds. You get the holding power of an incredibly strong adhesive, plus the filling power as well. It’s a one stop solution, and it’s very easy to use. Plus you won’t lose any sleep at night worrying about your repair.

See Also: How to Choose the Best Epoxy Resin for Wood

How to Use the Product

Depending on the size of the crack in your piece of wood, you may need to choose between two different types of epoxy. One of them being a 60 minute variety and the other being a 5 minute variety.

The biggest difference between the two is how long they remain in liquid form before they solidify too much to work with. If you haven’t guessed already, the number of minutes on the epoxy is the amount of time that you have to work with it.

For smaller cracks, use the five minute type. Mix it according to the directions, which is usually half-and-half. Then, use a thin tool to squeeze as much of it into the crack as possible. If the crack is open on the bottom, use tape to cover it up first.

The goal of this process is to fill the crack completely with epoxy and if possible, not leave any gaps. Once the crack is completely full, add a little bit more epoxy to fill it slightly higher than the surrounding wood.

Monitor your fill, and if it sinks in, add more product. If the fill stays right where it is, allow it to cure for the full duration as recommended by the manufacturer. This is typically 24 hours for a most two part epoxy products.

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See Also: Woodworking Tips Cards – Two Part Epoxy

One Really Big Crack Filler Tip

One gigantic secret tip that I can share with you for filling cracks in your wooden projects with epoxy is to dye the epoxy first. This involves using pigments and matching the color of the surrounding wood.

For starters, this is a much easier process on wood that is darker. Lighter shades are harder to match, and it’s really easy to spot the filler material. Darker colors however allow more forgiveness, and you can get away with a bit more.

Use pigment dies and mix them with your epoxy until the color blends perfectly with the wood that you are going to fill. Then, fill the crack with this mixture the same as how you would fill it with a clear mixture.

Use a fine bladed tool to get as much as you can down deep into the crack as possible, and just like before, fill it slightly more than level. Allow the product to dry for the full recommend a time, and then proceed to the next step.

See Also: How to be a Modern Renaissance Woodworker

The Book Store is Now Open!   Happy Building!

Leveling the Epoxy Fill

After the product is fully cured, it will be very dense. At this point, sanding through the filler material is easy, especially when you use a power sander or a sanding block with sandpaper by hand.

You can also use a cabinet scraper, which is a really easy way to remove the material without damaging the surrounding wood.

No matter which way you go, definitely make sure that there is a hard backing behind your sandpaper that will help you target the high areas only. This will naturally target the epoxy, and bring it down to the level of the rest of the wood.

Keep on sanding in till the only epoxy that you can see matches exactly what the open crack used to look like. If there are any halos or excess epoxy around the edges of the crack, keep on sanding until those are gone.

You are done when the epoxy itself looks exactly like the open crack used to look before you filled it.

See Also: How to Use Wood Filler

Tips and Tricks for Filling Defects

There are a couple little tricks that can help you get the most out of this type of gap filling in your wooden projects. Here they are, and they will help you do this process even better.

  • Use a tool to get that epoxy deep into the crack. The deeper the better, and it will mean a stronger bond and less chance of an opening in the future.
  • Buy a good two-part epoxy product with a long track record, and a brand that you recognize.
  • Only makes as much epoxy as you think you need, plus maybe 10% just for insurance.
  • Use an airline to blow any debris out of the crack before you start adding the epoxy.
  • Allow your epoxy to fully cure before moving to the next step, which will make it a lot easier to send level to the surface.

See Also: 50 Awesome Reasons to be a Woodworker

Your Action Assignment

Now that you know how to use the best wood crack filler in the world, which is two-part epoxy, it’s time to get out into the shop and take action. It’s also time to do a little practice, so grab your epoxy and a piece of wood.

If you don’t have a natural crack to work with, don’t worry about it. One cut on the band saw but stopping before going all the way through is a perfect way to simulate a crack.

Add some masking tape to the bottom so that way the epoxy doesn’t just pour through, and then practice filling that gap. I recommend making a cut that’s only a few inches long, because this is an academic exercise and you don’t want to waste a ton of epoxy.

Also, you can pick up some pigments and practice tinting the epoxy to match your wood as well. This is important stuff to know, because you may end up having to match color in the future on a crack in a piece of wood.

If you have any questions about how to use two-part epoxy to fill cracks in your woodworking, please post a question and I’ll be glad to answer them. Happy building.

Post Author-

brian forbes westfarthing woodworks llc owner

  • 20 Years Experience in Woodworking
  • 7 Published Books Available on Amazon
  • 750+ Helpful Posts Written
  • 1 Million+ Words Published

You Can Find My Books on Amazon!

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