5 Best Epoxy Wood Filler | Review + Guide

Epoxy wood fillers are the perfect solution for concealing any damage to your wooden furniture. Not only that, it will also add strength to your furniture and provide you with a fresh surface that can be stained. 

Plus, if you’re a DIY woodworker or enthusiast, you can easily fix any wooden surface with the epoxy fillers, thus saving a hundred bucks with just a decent amount of confidence, patience, and practice. But, with tons of options available, how do you choose the best one? 

It was only after extensive research that we were able to pick the best of the lot. And so, we ended up with the 5 best options that are worth every penny spent. Also, we’ve added a buyer’s guide to help you even further. 

Without any further ado, let’s jump right in! 

Listed below are the 5 best epoxy wood fillers from our list:

• J-B Weld Wood Repair Epoxy: Praised for its design as a two-part hand mixable putty stick perfect for DIY household wood repairs.
• PC Products Wood Repair Epoxy: Valued for its reliable performance for both outdoor and indoor applications, with an extended setting time.
• Minwax Wood Filler: Recognized for its fast-drying formula and extensive versatility, ideal for both indoor and outdoor repairs.
• System Three SculpWood Epoxy Putty: Appreciated for its kneadable form making it versatile for various repair tasks, both for interior and exterior surfaces.
• Abatron WoodEpox: Known for its ability to restore rotted and damaged wood, its slow drying time allows for precise application, suitable for heavy-duty tasks.

Here's the list of the 5 best epoxy wood fillers along with a buyer's guide to help you choose the perfect one for your wooden furniture.

1. J-B Weld Wood Repair Epoxy - Best for DIY Repairs

For over 40 years, J-B Weld has been manufacturing high-strength adhesives, and the latest model is no exception. The highlight of this product is that it’s a two-part hand mixable putty stick that lets you repair any household wood all by yourself. Thanks to J-B Weld for this wood repair epoxy which is perfect for all types of household wood. 

What we absolutely love about this epoxy wood filler is that it is specifically designed for DIY repairs. Unlike other epoxy wood fillers which are in the form of putty or pouring liquid, J-B Weld has done a great job in formulating a putty stick for ease of use. 

Furthermore, this putty stick allows you to repair all the wooden surfaces, challenging cracks and gaps without any professional help. Simply cut, knead, apply, and wait for it to dry. This tiny 1-ounce package works particularly best for door and window frames. 

Moreover, it has a shear strength of 900 psi, which is pretty decent in our opinion. And the best part is, it cures within one hour. After curing, you can machine, drill, sand, file, and even paint it. 

What’s particularly pleasing is that this 1-ounce stick is powerful enough to conceal and repair the damages right in the first application. Plus, this heavy-duty epoxy will neither shrink nor rot. As such, it is highly durable. 

This epoxy wood filler is undoubtedly an excellent option, mainly because of its unique stick design, ease of use, and durability. And for that reason, this wood filler comes with an expensive price tag. However, considering the design and features it offers, it is totally worth the extra bucks. 

2. PC Products Wood Repair Epoxy - Best for Outdoor Applications

Whether you have to repair the exterior surfaces of your home or have a large renovation project at hand, this wood repair epoxy paste will deliver excellent results. As such, you can use this epoxy for both outdoor and indoor applications. 

If you ask us, the best part about this wood filler is the setup time of 30 to 40 minutes. Unlike other epoxy putties, which harden quickly, the PC epoxy paste gives you plenty of time to work with. 

The putty is tough and can withstand UV light, fresh and saltwater, and dry rot. This makes it perfect for outdoor applications as it will neither pop out nor crack by being exposed to harsh environmental conditions. 

Plus, the thick consistency of this putty makes it perfect for applications on overhead and vertical surfaces. Its peanut butter-like consistency means fewer drips and sags, so it is highly versatile. You can use this to mend window sills and doors, fix railings and stairs, and fill cavities in damaged wood. 

What’s more, the tan color of this putty blends in beautifully with the wood. And, after it dries, you can sand, nail, drill, prime, and even stain it if you wish to. 

While testing, we did not come across any significant drawbacks. However, since it is epoxy wood putty, it is certainly not easy to clean. And so, we recommend you mix the two-part putty on some disposable surface. Apart from that, this putty paste works exceptionally well to repair rotten wood. 

3. Minwax Wood Filler - Best for Versatile Surfaces

Minwax has been producing top-notch quality products for years, and this 42853000 Wood Filler is no exception. This high-performing bonding wood filler is an excellent product as it repairs and mends all the cracks and defects on wooden surfaces. Moreover, you can use this product for both interior and exterior applications. 

Those who have used Minwax wood fillers can vouch for their quality. As far as Minwax 42853000 is concerned, we love its fast-drying formula. Not only does it set in a few moments, but it also allows you to sand within minutes after applying it to the surface. 

Furthermore, this wood filler is high in versatility, as it can be used for various surfaces. You can use this to fix the damaged wood floors and repair, restore, and rebuild cracked wood. Also, you can use this filler as a powerful adhesive to fill hardwood floors, which is a bonus. 

What’s more, this filler also doesn’t shrink or crack, thanks to its solvent-based. And this is what makes it perfect for all your outdoor repairing needs. Plus, its cheese-like consistency makes it easy to use and highly durable. 

Also, it accepts stains without any hesitations, and cleaning is a breeze with just soap and water. Lastly, it allows you to mend all the cracks, holes, and defects without costing a fortune. 

We were pretty satisfied with the overall results produced by Minwax Wood Filler. However, while testing the product, we noticed that the filler due to its thin consistency drips from the end of the putty knife. 

So, we recommend you use it in small quantities to avoid messing the surfaces or carpets around you. 

4. System Three SculpWood Epoxy Putty

Next up, we have another quality product from System Three. The SculpWood epoxy putty is an excellent choice for people who do not have much experience using epoxy wood fillers. This two-part epoxy resin putty is solvent-free, kneadable, and everything you’ll need for wood repairing and restoration tasks. 

The SculpWood Epoxy Putty does an outstanding job in restoring the worn-away wood and mending the challenging cracks. Kudos to SculpWood for formulating a kneadable resin putty instead of a wood filler product. You can knead it like bread dough into any shape you want. 

As such, this kneadable putty is highly versatile. You can use this to repair your window sills, door, fence, furniture, and other cosmetic defects. Plus, it is also usable on both interior and exterior surfaces, thanks to its waterproof formula. Although it is kneadable, it hardens as fast as the other epoxy wood filler, which is impressive. 

What’s more, it is tough and furnishes the surfaces with excellent adhesive strength. Not only that, but it is sandable and holds the paint, screws, drilling, and nails pretty well. The 1-quart can is decent enough for all your minor repair work and will last longer if you store it properly. 

We couldn’t help but notice a couple of downsides to this otherwise outstanding product. First, it takes slightly longer than 20 minutes to set. So, we recommend you work with patience for exceptional results. 

Secondly, because this moldable epoxy putty works pretty well in repairing rotten and chipped wood, it comes with an expensive price tag. 

5. Abatron WoodEpox

Our next product is perfect for all your heavy-duty tasks. For all your aging decks and rotten wood, there’s nothing better than Abatron WoodEpox Replacement Compound Wood Filler. This Wood Epoxy is easy to use and works well in large areas. It is an excellent product for all DIYers and professional woodworkers. 

One of the best things about this product is that it perfectly restores rotted and worn-away wood. You can use this for refilling and restoring any chipped wooden surface.

Furthermore, this filler has a slow drying time. This allows you to fill the cracks precisely and accurately without worrying about the putty drying away. Plus, it does not drip, which we absolutely loved about wood fillers. You can either apply multiple layers or spread them in a single go. 

What is particularly impressive is that you don’t have to be a professional to use this for repairing your window sills or cabinet, for this epoxy wood filler comes with detailed instructions. And so, it is easy to use. 

What’s more, this epoxy wood filler dries as hard as a rock making it tool-able, sandable, and paintable. As such, this ensures the durability of the putty. Once applied, you don’t have to worry about the health of the wood. 

The Abatron WoodEpox bonds your rotted wood exceptionally well. However, the containers are pretty small compared to other Abatron products that we bought earlier. For some, it might be an expensive deal. 

Plus, cleaning is quite a challenging task. We recommend keeping some rubbing alcohol handy to clean up the excess epoxy from the wood. 

What is the Best Epoxy Wood Filler?

In this section, we provide a comparison of top-rated epoxy wood fillers. The table below presents key product specifications, including type, dimensions, weight, cure time, waterproof capability, and paintability.

Buying Guide for the Best Epoxy Wood Filler

By now, you know the best 5 epoxy wood fillers that you can consider for repairing window sills or cracked cabinets. However, buying a wood filler isn’t a piece of cake. And so, simply knowing the best epoxy wood filler along with its pros and cons isn’t enough information. You need to be aware of a lot of factors that come into play. 

So, to help you choose the right epoxy wood filler, we have discussed all the important factors here. After reading this, we are pretty confident you’ll be able to choose the best one for your needs.

Type of Wood Repair

While choosing an epoxy wood filler, you need to first keep in mind the nature of your task. There aren’t any one-size-fits-all epoxy wood fillers. A wood filler ideal for fixing large holes might not be a perfect solution for repairing furniture.   

If you have to fix large holes, you must go for a strong and durable wood filler. Meanwhile, for repairing cracks on your furniture, you will have to go for the one that will be easily sandable and paintable.

Viscosity

The next thing to keep in mind while choosing a wood filler is its viscosity or consistency. There are wood fillers manufactured in different viscosities to suit different needs.

The peanut butter-like consistency of the thick fillers makes them perfect for repairing overhead vertical surfaces, large holes, and gaps, for they don’t drip. Meanwhile, the thin viscosity fillers have a watery consistency making them ideal for minor scrapes, chips, and surface damage on your wooden surface. 

We strongly recommend you consider the nature of the task and then decide which wood filler would be perfect for your repair work.

Interior or Exterior

Believe it or not, the interior and exterior wood fillers aren’t made of the same component. So, you cannot expect an interior wood filler to do the job of an exterior one. An exterior wood filler must be resistant to UV rays, heat, water, termites, molds, and scratches. 

Plus, it should be long-lasting. And so, we strongly recommend you go with a product suitable for both interior and exterior use. 

What does viscosity mean and why does it matter in epoxy wood fillers?

Viscosity in epoxy wood fillers signifies the consistency or thickness of the fillers. Fillers with a thicker consistency, mimicking peanut butter, are generally more suited for filling larger holes, and gaps and repairing vertical surfaces as they prevent dripping. On the other hand, those with a thinner, liquid-like consistency are best for tackling minor scrapes, chips, and superficial damage. Recognizing the viscosity needed for specific repair tasks aids in choosing the right filler.

Is it advisable to use the same epoxy wood filler for both inside and outside applications?

Not all epoxy wood fillers are intended for both indoor and outdoor usage. Fillers for exterior purposes are specifically formulated to withstand harsh conditions like UV rays, heat, water, termites, molds, and physical scratches, making them considerably more durable and weather-resistant. Hence, it's advisable to select a wood filler designed for both interior and exterior applications as it offers durable repairs in any condition.

What steps should be followed when applying epoxy wood filler?

Applying epoxy wood filler involves preparing the repair site first by cleaning and removing any loose or damaged wood sections. Then, the epoxy resin and hardener need to be mixed as per the instructions provided by the manufacturer. Proceed by applying the mixed filler to the damaged area, shaping, and smoothing it to blend in with the rest of the surface. Allow ample time for curing before moving on to sand and finish to achieve a well-polished, repaired wood surface.

Can epoxy wood filler undergo sanding and staining processes?

Indeed, epoxy wood filler can be sanded to create a polished finish once it has fully cured, using either sandpaper or a sanding block appropriate for the task. Staining the wood alongside the repair site can help in achieving a uniform appearance over the whole surface. It is recommended to follow the staining guidelines provided by the manufacturer of the wood filler to achieve optimal results.

What is the typical lifespan of epoxy wood filler?

The durability of epoxy wood filler relies on multiple factors, including the quality of the product, the technique of application, and the environmental factors it is exposed. When epoxy wood fillers of superior quality are applied correctly and maintained properly, they often result in long-lasting repairs that extend over several years.