What Is And How To Use The Epoxy Wood Filler 

Epoxy wood filler is the perfect product if you’ve got a hole in your door or a piece of furniture with some rotting wood. These are things that you need to repair.

While you could hire someone to help you with fixing these items, they’re also DIY projects that are not difficult to do.

Just pick up some tools, follow the instructions and you’re good to go. Not only will it help with saving a good amount of money, but you’ll also feel like a talented craftsman after you’ve done the repairs. 

Epoxy Wood Filler

Epoxy Wood Filler for Your Specific Repair Project

Below, we’ll provide you with everything you need to know about epoxy wood fillers. We’ll provide a brief overview of what a general epoxy wood filler is.

We’ll also answer some frequently asked questions, and provide you with detailed reviews of six of the best epoxy wood fillers that we’ve found. This will help you choose the best epoxy wood filler for your job.

What is an Epoxy Wood Filler and What Do I Use it For?  

It’s essentially a filler that’s used to fill any unsightly dents, scratches or cracks. It’s also one of the rare fillers out there that’s a reliable adhesive. As it forms a strong bond permanently with wood fibers and comes with special structural characteristics, it’s a great product to use to repair damaged wood.

Additionally, as there’s no water or solvent to evaporate, epoxy also does not shrink. You can also use an electric sander on your epoxy wood filler and paint over it after you’re done. 

Epoxy wood fillers are often used to repair and seal any cracks and holes in damaged wood components.

You can apply it with a spatula or even syringes or brushes. Some epoxy wood fillers are also mixed with wood flour to help with increasing its strength. 

Tips for Using Epoxy Wood Filler

Tips for Using Epoxy Wood Filler

If you’re new to DIY projects using a wood epoxy resin filler, here are some helpful tips to get you started

  1. Epoxy should generally be used for large voids in existing wood. If you like, you can also mix epoxy with tints and pigments from an art supply house for an additional touch of color.
    • When applying, make sure you’re doing so carefully with a knife or wooden stick as it can be difficult to clean up.
  2. You should always follow the manufacturer’s recommendations when mixing your epoxy, and make sure that you’re using the right ratios to ensure that the glue cures fully and reaches its maximum strength.
  3. Epoxy generates heat from the chemical reaction as it cures. It’s best to mix it in smaller batches.
  4. Take the necessary safety precautions when working with epoxy in household repairs. It’s important that you’ve got proper protective clothing and safety glasses.
    • Make sure that you’re also working in a well-ventilated space. Long-sleeved clothing is also recommended along with mouth protection.
  5. When mixing, try and do so in a plastic container as epoxy simply peels out after it has set.
  6. Epoxy is not UV-resistant, so if it’s meant for the outdoors you should topcoat your wooden piece with an exterior varnish or paint.

Best Epoxy Wood Filler for All Kinds of DIY Repairs

Here are some of the top epoxy wood filler products along with a few benefits of each.

J-B Weld 8257 KwikWood Wood Repair Epoxy Putty Stick- 3.5 inch

Epoxy Wood Filler DIYView in gallery

This epoxy putty stick comes in two different lengths of 3.5 inches and 7 inches to suit your needs. The wood epoxy putty is formulated to repair and rebuild wood and is easy to use and great for your household DIY repairs.

To mix the two-part epoxy filler formula, you’ll need to do so by hand. Then, leave epoxy wood filler for about 30 minutes to set before the curing process completes within an hour.

When completely cured, the putty version also has a light tan color that’ll match most wood species with no issues at all. 

In terms of strength, this wood epoxy putty has a 900 PSI strength. It won’t shrink or rot and you can sand, stain, drill and shape it according to your needs. Feel free to use it on door hinge repairs, dry rot repairs and more.

Customers who have purchased this product are satisfied with their purchase. Not only is wood epoxy putty easy to use, but people also mentioned that it does a great job. 

Pros:

  • Epoxy putty is easy to use 
  • Will not shrink or rot 
  • Epoxy putty can be used for things from knot holes to rotted wood 
  • Can be mixed by hand

Cons:

  • Epoxy putty does not take stain well 

Minwax 21600000 High-Performance Wood Filler

Minwax 21600000 High-Performance Wood FillerView in gallery

This high-performance epoxy wood filler is exactly what you need if you’re looking for a great product for restoring wood. Not only can it permanently repair any damaged or rotted piece of wood, but you can also use it to fill gouges or minor depressions.

What’s great about this particular epoxy wood filler is that it is weather-, water- and rot-resistant. If you like, you can also use it as a wood adhesive when you add screws and secure loose joints. Essentially wood filler acts as glue in this case.

This is a prime epoxy wood filler for permanent bonding to wood. It also forms a durable bond with other rigid surfaces such as ceramics, metal and even fiberglass.

You also won’t have to worry about it shrinking or cracking. Moreover, it’ll harden in 15 to 20 minutes and is ready to sand in about half an hour.

Customers like how this epoxy wood filler is easy to work with and dries hard quickly. They also appreciate that it isn’t expensive and does the job both quickly and efficiently. 

Pros: 

  • Easy to use 
  • Dries quickly 
  • Inexpensive 
  • Weather, water and rot-resistant

Cons: 

  • Some reviews have mentioned that customers have issues with this epoxy wood filler drying too fast 

Elmer’s E855 Carpenter’s Wood Filler

Elmer's E855 Carpenter's Wood FillerView in gallery

If you’re looking for an easy to use epoxy wood filler that’s both paintable and sandable, this particular product will do the trick. Not only will you be able to easily sand it to a smooth finish, but it’s also resistant to shrinking and cracking.

If you need to clean up this epoxy wood filler you can do so with water, and it comes with a resealable tube so you can use it for small jobs with no issues at all. 

Feel free to use it to fill all the holes in a piece of wood, fill gouges in hardwood floors and restore wood in general. This particular epoxy wood filler is meant for indoor use, and it’ll take about 12 to 24 hours to dry.

Individuals who have purchased this love it as they mentioned that it’s an easy wood fix because it goes on and sticks nicely. They also appreciate that it’s a gentle sanding process and doesn’t take too long to dry.

Perhaps one of the biggest pluses of this epoxy wood filler is that you can paint over it very nicely

Pros: 

  • Easy to sand 
  • Paintable 
  • Comes with a resealable tube 
  • Sticks nicely

Cons: 

  • Can only be used indoors 

Bondo 20082 Home Solutions Wood Filler

 Bondo Home Solutions - Wood FillerView in gallery

This epoxy wood filler from Bondo is great if you’re looking for a solution that’ll allow you to make quick and durable repairs to damaged or rotted wood.

Not only will this liquid wood filler cure quickly – usually within 15-minutes — but it’s also sandable. If you’d like, you can also go ahead and stain and paint the epoxy wood filler after it has set for about half an hour.

Additionally, ingredients make this epoxy wood filler waterproof so you can also use it as an exterior wood epoxy filler.

Feel free to use the liquid epoxy for repairing doors, windows, furniture and more. As this epoxy wood filler turns medium brown once mixed, it works well and blends in with a wood surface.

Customers like this epoxy wood filler and recommend it for large repairs and for internal filling of damaged wood. They also mentioned that the liquid wood filler cures fully pretty quickly and is ready for sanding and painting not long after. 

Pros:

  • Cures fast 
  • Water-resistant 
  • Turns medium brown – blending in with most furniture 
  • Sets up pretty quick

Cons:

  • Once mixed, you’ve only got a couple of minutes of work time to use the product 

Two Cans Wood Repair Epoxy Paste

Woody Wood Repair Epoxy PasteView in gallery

This two-part epoxy wood filler paste is great for replacing any missing wood or fixing rotting wood in your furniture. Not only is this resin wood filler resistant to UV-light, but it’s also both mildew and dry rot-resistant. You can use this epoxy wood filler indoors but it’s also a great exterior epoxy wood filler.

Unlike other epoxy wood fillers, you’ve got a work time of at least 30-40 minutes with this solution and you can paint, stain and machine it after it has fully cured.

It’s similar to a wood epoxy putty but with a looser consistency and is a good external sealer. 

Exterior epoxy wood filler is resistant to all weather conditions, and won’t shrink, crack or pop out of exterior wood. It is tan-colored – which lets it fit in with most wood with no issues. It also comes with a strength of 850 PSI.

You can use this wet epoxy wood filler to fill all the cracks and knots in wood, fix stairs and railings, and even preserve the original construction of historical buildings.

Customers like this resin wood filler as it’s easy to use and will effectively repair damaged wood and is good for rebuilding wood.

It’s especially handy because you can apply it to the whole surface. They also appreciate that it’s sandable, paintable and stainable. 

Pros:

  • UV-light, mildew and dry rot-resistant 
  • Can be painted, stained and machined 
  • Resistant to all weather conditions 
  • Easy to use and durable substance

Cons:

  • Some mentioned that it’s not quite moldable 

Coconix Floor and Furniture Repair Kit

Coconix Furniture Repair KitView in gallery

If you’re looking to repair your furniture, it can’t get any easier than this. This repair kit comes with an epoxy wood filler that’s great for chips, cracks, holes, scratches and more. Feel free to use it on a desk, shelf, decks and more.

It works well on any material and wood of any color. With this purchase, you’ll get 10 base compounds so you can mix it to achieve the color that you need. 

If required, there’s also enough compound for you to fix large areas with ease. Instructions are also incredibly easy to understand and you’ll cover damages and cracked areas on wood in no time at all.

If you’re new to fixing wood, you’ll be happy to know that this kit comes with a step-by-step guide to help you achieve the best results.

Customers are incredibly happy with this product as it allows you to blend your patches with no issues at all. They also like how it comes with plenty of videos that’ll teach you how to do it like a pro. 

Pros: 

  • Comes with 10 base compounds so you can achieve the color that you need
  • Great for large areas
  • Comes with instructions and a step-by-step guide 
  • Plenty of paint in each tube to last for plenty of repairs

Cons: 

  • Hard to figure out the right colors for your original wood pieces

Frequently Asked Questions (FAQ)FAQ

Will epoxy stick to wood filler?

It depends on what type of epoxy wood filler you’ve purchased. Generally speaking however, epoxy wood fillers are a reliable adhesive so they will stick. Epoxy resin in particular sticks to nearly all surfaces and the thinner the resin, the more likely it’ll penetrate the pores of the wood and bind to it.

What is epoxy filler used for?

They’re great if you’re looking for a filler that has more structural integrity – perhaps for a widening crack or a rotting void. They come in either a tube or a can and can be either clear or colored – depending on your needs. When using an epoxy filler, it’s important that you apply it with care. 

How Do You Fill Holes in Wood with Epoxy?

There are a couple of steps that you’d need to take to fill holes in the wood with epoxy. 

1. If you’re filling rotting wood, you’d need to find and stop the cause of the rot. If you’re not sure what’s causing the rot or how to repair it, it’s best to call a professional for some help. If there’s moisture within the rot, ensure that your wood has about a week to dry properly as trapped moisture can cause additional rot and even prevent the epoxy from bonding properly.
2. Then, you’d want to probe the area surrounding the damaged woo to determine the extent of the rot. Soft wood should either be removed or reinforced with epoxy consolidant.
3. Once you’ve determined the cause, proceed to remove all decayed wood before applying the liquid wood epoxy consolidant according to the manufacturer’s instructions. You’ll want to work it into the wood with a small brush until the entire wood is saturated. Then, go ahead and let it dry for at least a week before starting the next step.
4. Before applying the epoxy, you’d need to go ahead and mix it. As epoxy can harden – especially in warmer weather, you’d want to work with it quickly. Try and keep your epoxy materials as cool as possible when you’re working with it, and you can speed up hardening with a hairdryer or spotlight.
5. Then, go ahead and fill the wood cavity with the epoxy wood filler. Start by pressing the putty into the area with a putty knife. Make sure that you’re pressing hard so all voids are filled and there’s a good bond.
6. After that, you’ll want to make sure that you’re wearing chemical-resistant rubber gloves to shape the epoxy with your fingers and overfill the repair. You don’t need to get the shape perfect, just make sure that you’ve got enough material leftover to match the surrounding profiles.
7. With that, you’re good to go when it comes to filling the hole with epoxy. If it’s warm, you’ll be able to shape it in about three to four hours. If not, you’ll need the patch to harden overnight. Once that’s done, you can go ahead and sand the epoxy or proceed to paint over it.

Is epoxy a good wood filler?

Epoxy wood filler is ideal for restoring old wood that is too hard to remove or expensive to replace. It can take care of filling holes and cracks completely. You can shape epoxy putty to fit spaces.

It sticks really well and it makes a durable surface. You can also sand it.

When should I use epoxy wood filler?

Use an epoxy wood filler to fix cracks and holes and for replacing wood that has been damaged. You can also fill and replace rotted wood with an epoxy filler because it creates a permanent bond.

Depending on the type of epoxy filler, you can put it on with a brush, a palette knife, a plastic knife or even a syringe.

Can you paint over wood filler?

Once epoxy wood filler attaches to the wood and cures, you can paint it. But, wood is porous and this type of wood filler is not, so you might need to do some more prep to the surface.

Do you have to seal wood before epoxy?

It is very important to seal a porous surface like wood before using epoxy filler. The easy part is that you can apply some resin to the wood and let it set as a sealer.

How do you fix rotten wood without replacing it?

Use wood epoxy resin filler to fill in areas of rotted wood. They are simple to apply and they stop the rotting process, cure quickly and don’t shrink.

Is wood filler waterproof?

Wood filler contains sawdust or wood fibers mixed with some type of binder. This means it isn’t weatherproof, but it is water-resistant after it is fully dry. Wood putty typically contains with epoxy, fiberglass or polyurethane, and it doesn’t fully harden. You can use it for outdoor projects.

Conclusion

We hope that this article was helpful, and you’ve learned a little more about epoxy wood fillers including epoxy putty. Repairing your wooden furniture or wooden structures in a DIY project doesn’t have to be an arduous process.

This is especially true if you’ve got the right epoxy wood filler.

When using an epoxy wood filler, remember to ensure that you’re mixing it as per the manufacturer’s instructions and wearing the appropriate safety gear.

By taking the necessary precautions and mixing your wood epoxy resin filler accurately, you’ll fix up your damaged wooden pieces in no time at all.