Amidst a home improvement project, you may wonder whether to use wood filler or spackle. It’s easy to pick whichever, but choosing the wrong product can result in uneven and weak patches in the long run.
So rather than wasting resources on trial and error, join our resident woodworkers in this detailed wood filler vs spackle comparison to determine the best product for your needs.
About Wood Fillers
Typically, a wood filler includes different substances like polyurethane, clay, and epoxy resins. It’s a material you can rely on to fill gaps, holes, and cracks on a wood surface.
And since it bonds well with wooden materials, many newbies still mistake this product for wood putty. Particularly, you may opt for a quality epoxy resin for thick pours to achieve great results!
Besides filling small holes, you can also apply wood filler to hide flaws like small cracks and scratches from wooden materials. However, it’s important to note that not all these compounds suit the same wood surfaces.
If you scan the available products in today’s market, you’ll discover that some wood fillers don’t respond well to wood stain applications or sanding. In this case, you might want to check this review of the best stainable wood fillers here!
You should also be careful not to use a filler material for interior wood surfaces when working on outdoor projects.
You may not know, but using the wrong filler with incorrect grading will affect its effectiveness in filling small cracks or other sealing tasks.
Although it’s a material specifically for wood materials, you can also use it as a drywall compound to fill small holes.
Related Read: How to Fill Cracks in Wood Using Epoxy
Kinds of Wood Filler
Oil-Based Wood Filler
Since an oil-based wood filler includes either vinyl or epoxy in its ingredients, it carries a high amount of volatile organic compounds or VOCs.
Because of this, you’ll notice that this wood grain filler emits a more pungent odor than other options.
And while you can also utilize quality epoxy wood fillers to repair holes, it’s more suitable for larger projects.
It also takes longer to dry than water-based wood fillers, so achieving a smooth finish can be challenging, especially if you need to apply it in multiple layers.
The upside of filling cracks with this wood filler is it gives the surface better adhesion and durability. It can also stand against harsh weather conditions and water-related damage.
After applying this filler, we suggest using mineral spirits to clean its surrounding wood. Don’t attempt to use soap and water as a cleaning mixture because they’ll be ineffective.
Water-Based Wood Filler
When it comes to a water-based wood filler, you can expect it to include gypsum plaster and cellulose substances.
If you ask us, filling nail holes with this material can be easier for newbies since it doesn’t produce a foul smell during usage.
You can also opt for this wood filler if you’re not keen on using toxic materials. Its non-toxic attributes make this product a safe option for indoor wooden surfaces.
It only requires soap and water for cleaning, unlike various wood fillers. Given that it’s not messy to apply, you don’t need to worry much about yielding a smooth surface.
The only problem is it’s not as durable as its oil-based counterparts. For this reason, our woodworking experts don’t urge you to use water-based wood filler for large-scale projects or exterior applications.
Although it carries less volatile organic compounds [1], we still recommend wearing essential protective equipment before using it.
Read Next: Should You Expect Wood Putty to Harden?
Homemade Wood Filler
Believe it or not, you can create a homemade wood filler with sanding dust from your previous woodworking project.
All you need is to mix the dust particles with wood glue. Once these substances are together, you can use the filler to fill nail holes or quick wood crack repairs.
Since it’s a homemade product, it doesn’t offer the color variation that wax filler sticks have. It also doesn’t include common wood filler ingredients like stabilizers or additives.
Laminate Flooring Wood Filler
Wood fillers are known to fill cracks and gaps for small furniture pieces, but did you know that they also work well for laminating wooden floors?
Applying wood filler on laminate surfaces means that you can cover obvious flaws like gouges, cracks, and holes.
You won’t have difficulty spreading this wood filler over the damaged area because you can utilize a putty knife to level its application.
Don’t forget that the product specification dictates if you can sand or stain the surface after application. We advise you to check the labels first before purchasing the wood filler.
Pros and Cons
Pros
- It’s more flexible than wood putty
- Suitable for repairing holes and cracks
- You can use it as drywall mud
- Great adhesion to porous surfaces
- Users have more control over its consistency
Cons
- Not immune to temperature changes
- Not the easiest material to sand
About Spackles
If you look closer, spackle and wood filler mainly differ in consistency. Although both can cover a crack and fill a nail hole, spackle includes more durable substances.
It’s a material consisting of gypsum, which comes from calcium sulfate hydrate and other binder elements.
Between spackles vs. wood fillers, the former dries faster and shrinks less. Thanks to these attributes, they can fill shallow cracks better than deeper gaps.
Despite its water-based properties, its durability as a wood finish won’t be affected. You can still count on it to fix exterior & interior walls, primarily because this product is specifically for drywalls.
If you need to apply spackle on outdoor projects, we urge you to prime the damaged surface first for better results.
Kinds of Spackle
Standard Spackle
Unlike lightweight spackle, this material includes more than gypsum. It has traces of adhesives and additives in its component, making it suitable for heavy-duty repairs.
If you inspect closely, this spackle has a rigid consistency. Because of this feature, many construction workers use it as a semi-solid drywall material.
Lightweight Spackle
Since this spackle comprises sodium silicate and adhesives, we only recommend it for small-scale wood repairs. It’s an excellent material for newbies, considering how easy it is to dry and sand.
Thanks to its lightweight structure, applying a single spackle coat should suffice to fill a small crack or hole.
Epoxy-Based Spackle
As a spackle with oil components, you can count on this material to resist water and moisture damage better than its water-based alternatives. Its durability against external elements makes it an excellent tool for outdoor wood repairs.
This product comes in two packages—one for the hardener and another for the resin. Don’t forget to check the instructions for proper volume and mixture.
Acrylic-Based Spackle
An acrylic spackle is a material you can apply in multiple layers to cover and fill deep gouges. So, in a sense, it’s similar to a vinyl spackling compound.
Besides wood repairs, acrylic spackle works well as drywall or plaster because it’s less likely to shrink than other materials.
Vinyl-Based Spackle
You can utilize a vinyl spackle for filling holes and cracks with a depth of up to ¾-inch. If you’re fixing surfaces with deeper gaps, you’ll need to add more layers for a more durable result.
The problem with using a vinyl-based spackle is its long drying time. You must wait for the application to dry before applying another coat.
Pros and Cons
Pros
- It’s less likely to shrink after drying
- Stainable and easier to use
- More affordable than a wood filler
- Excellent durability for interior and exterior projects
Cons
- Not the best option for deeper holes
- It may crack when exposed to harsh conditions
Differences Between a Wood Filler and Spackle
Uses
While spackle and wood filler look similar, the latter is a product specifically for wood materials. On the other hand, spackle products are typically for drywalls and plasters.
Some woodworkers use spackling compound and wood filler interchangeably because they seal effectively on wooden and metallic surfaces.
However, the natural lumber fibers on wood fillers make them less effective on materials like drywall and metal.
We recommend wood fillers on porous species like walnut and mahogany. Since these materials have fewer pores, you can achieve a better finish on these surfaces than others.
If you ask us, spackle is more versatile than wood fillers. Even though the latter works better in wood, this product is compatible with various materials like masonry, finished metal, and plaster.
Application
The application process between spackle vs wood filler is similar. Since you have to patch the damaged area with paste, all you need to do is add a generous amount of paste from each product and spread it evenly.
You can use a spatula or putty knife to apply these products. Let them dry completely on the wood trim or other surfaces before sanding them for a smoother effect.
Shrinkage
As mentioned earlier, spackle has excellent resistance to shrinkage. After applying it in holes, this material can retain its form after drying and stands strong against weather changes.
Meanwhile, some wood filler types aren’t durable enough to withstand changing temperatures. If you don’t want to encounter material shrinkage, our best advice is to opt for oil-based fillers.
Sanding
You won’t need a power sander to smoothen a spackling compound since it’s not a stubborn material.
At best, you’ll only need a sanding sponge to even the surface. It also has a shorter sanding time than wood filler since it doesn’t require too much pressure.
Dry Time
A typical spackle will take around 30 minutes to dry. However, it can extend to one to two hours if you repair deeper and larger damaged areas. You can buy a fast-drying spackle if this waiting duration does not work for you.
On the other hand, wood filler takes longer to dry than the previous alternative. If you’re using a water-based product, deeper gaps will take five to six hours. Meanwhile, oil-based ones can take one to two days to cure.
Painting and Finishing
Both wood filler and spackling compound require primers before painting to make the color pop. You may not know, but priming can help the surface accept paint better.
Although both products can be sandable after drying, spackle yields a smoother and more even finish than fillers. Because of this, it’s easier to sand.
Which is Better to Use for Nail Holes?
It depends on the material you’re trying to repair. If it’s a wooden surface, it’s best to fill holes with wood fillers. In contrast, spackle works better in covering gaps in drywall and plaster.
Which is Better to Use for Baseboard and Trim?
Since most baseboards and trims are wood, they suit interior wood fillers better than spackle products. These materials have a specific formulation that allows them to stick to wooden surfaces better.
Tips and Tricks for Using Wood Filler and Spackle
Before adding the wood filler, don’t forget to smoothen the rough edges with a sander. You should also wipe the surface with a clean rag to eliminate dust particles.
If you can, reading the product instructions and labels is crucial for safer usage and better results.
When mixing spackle products, you must do it in batches for easier dissolution. It’s also wise to create mixtures on wide containers.
Before sanding any of these products, you must inspect if the applied area shows signs of shrinkage. You can only proceed to sand if the surface is clear.
Our Top Picks for a Wood Filler and Spackle
Gorilla All-Purpose Wood Filler
Besides coming from a reputable manufacturer, Gorilla All-Purpose Wood Filler quickly caught the eye of many woodworkers because of its flexibility.
After it dries, this filler is durable enough to resist shrinkage and cracks. It also accepts wood stain and paint, which will suit your design expectations.
What We Like
- Available in affordable and pocket-size variations
- Suitable with painting and staining
- Durable enough to accept nails and screws
- Smooth and natural wood-like finish
What We Don't Like
- It may irritate the skin when used without gloves
- More suitable for small-scale repairs
Dap 12328 DryDex Spackling Interior/Exterior
More than anything else, the best feature of Dap 12328 DryDex is its color indicator. It has a unique ability to change color, determining if the ideal dry time is achieved.
Once the spackle turns white from pink, it signifies that the surface is ready for painting and sanding.
What We Like
- Suitable for indoor and outdoor usage
- Flexible enough to handle wood, drywall, and plaster materials
- Sandable and paintable after proper drying
- It doesn’t have any priming requirements
What We Don't Like
- It has an unnatural color
- Not the best option for wood surfaces
FAQ
What will happen if I use the wrong wood filler?
If you use the wrong filler, it’ll likely come off faster and easier than you expect. The compound won’t bond well to the surface, damaging the wood further instead of fixing it. It’ll also ruin your material’s visual aesthetic.
What is the best formula to cover large holes?
It depends on what material you’re trying to fix. Spackle is the best option if the holes are in drywall or plaster. Meanwhile, fillers are more workable on wooden surfaces.
Read Next: Should You Opt for Warm Satin or Clear Satin Polyurethane?
Conclusion
In this wood filler vs. spackle comparison, it’s clear that they cater to different materials. We understand why using them interchangeably can be tempting, especially because their uses and perks often overlap.
However, our resident woodworkers would like to highlight that their effectiveness mainly differs according to the material in question.
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