Skip to Content

Can Wood Filler Hold Weight? [And How Much]

Wood filler is a product you might think of using to hang your decorations or any other items. However, before you do that, you must first determine whether you can hang anything with wood filler. Will it hold weight? To provide an answer, we turned to experts who have been dealing with wood. 

Disclosure: We may get commissions for purchases made through links in this post.

A wood filler cannot withstand heavy pressure or weight. It can only support tiny screws with very low loads or stresses.

The dimensional strength of wood filler is altered by heavy loads or strains, and the filler will eventually disintegrate. As a result, the wood filler cannot retain heavy screws that are subject to a heavy load. 

You've likely heard of several kinds of wood fillers. However, how comprehensive is your knowledge of this subject? How well-versed in the many kinds of wood filler are you? To learn more about this topic and better comprehend the above response, read the entire article.

Sealing cracks in old garden table with acrylic putty, Can Wood Filler Hold Weight? [And How Much]

What Is Wood Filler?

Even the finest wooden masterpieces will require some maintenance. Cracks and breaks in wood can frequently be found in unexpected places. This explains why wood fillers are so common.

Wood fillers are excellent at hiding flaws and defects. Real wood fibers are included in wood fillers, which are often made of sawdust. A wood waste suspended in a binder that may be petroleum-based or water-based dries to a hard surface.

Wood fillers can be stained and sanded. Despite drying hard, a wood filler does not give the wood applied any additional structural strength, which is the reason why it cannot hold weight.

Can You Screw Into Wood Filler? 

Stainless Steel Wood Screws in use, screwing screw into a wood

Yes, you can screw it into the wood filler. But which kinds can you screw into, given the variety of fillers available on the market?

Any epoxy-based filler is the best wood filler to screw into. Any good epoxy wood filler can be drilled into, painted over, or sanded. But before you start screwing into epoxy, you must make a pilot hole.

When screwing into the epoxy wood filler, just make sure that it doesn't contain any air bubbles before it dries. Drill a pilot hole to help the screw travel smoothly.

Additionally, keep in mind that if the screws are holding heavy weight, any wood filler could crack.

Check out this wood filler on Amazon.

Choosing the Right Screws 

Recently, it has been a little redundant to drill pilot holes due to the widespread availability of self-tapping and drilling screws. The tiny pre-drilled holes we make in the wood, called "pilot holes," make it simpler to screw into lumber.

Screws That Self-Tap

Small notches on self-tapping screws are made to make it simple to tap a hole into softwoods. To utilize self-tapping screws on softwood types, no pilot hole is necessary.

Screws That Are Self-Drilling 

On the other hand, self-drilling screws are made to hold stronger hardwoods. And if you have difficulty getting screws to remain in wood, this is extremely useful.

Self-drilling screws can now drill into metal without a pilot hole in addition to resistant hardwood. They can do this because of their drill-bit-like tip, which can pierce material without the need for a pilot hole.

Epoxy is an extraordinarily tough substance. Epoxy wood filler is well known for being highly durable and standing up well to wear and tear.

Consequently, you must drill a pilot hole before using self-tapping screws in epoxy wood filler. However, self-drilling screws should nevertheless be able to screw into tough epoxy resin without the need for a pilot hole if you are utilizing them.

What Are The Types of Wood Filler?

Dowel joint stock

In addition to epoxy wood fillers, there are other types of wood filler, including water-based and petroleum-based fillers. Read on for more information.

Water-Based

Water can be used to smooth out the consistency of water-based wood filler and to rinse your putty knife after using it with water-based fillers. Water-based wood filler tends to be a little bit crumbly.

The drying period for some of these wood filler products might be as minimal as 10 minutes.

As a result of its consistency, it is a poor choice for finished woods but a fantastic choice for porous, unfinished woods, which it takes very well.

Find this water-based wood filler on Amazon.

Petroleum-Based

On the other hand, petroleum-based wood fillers have a naturally finer consistency and are better at defending wood from moisture and humidity. Petroleum-based wood fillers can be distinguished because they cannot be washed down with water.

For cleaning tasks, the instructions will mention acetone, mineral spirits, or some other chemical solvent. These kinds of wood fillers similarly cover and fill in gaps, but they also connect wood pieces, reducing the likelihood that shortfalls and uncovered joints would split over time.

DAP Wood Filler

DAP, the most widely used latex-based filler, has some of the best uses. The term "plastic wood" refers to a high-end, latex-based wood filler that is used to create surfaces that, both practically and aesthetically, resemble real wood.

It can be treated like genuine wood by painting, staining, drilling, hammering, and polishing it after it has cured. For a small, shallow gap or hole that only needs a little amount of filler, it can dry in as little as 15 minutes.

However, it can take up to 24 hours for the area to completely dry if the hole or gap is bigger, deeper, or broader than 1/4 inch. You can, however, employ the finishing elements you've chosen for your creation once it has dried. 

Although sturdy and tough, plastic wood filler is not as robust as an epoxy wood filler. If maximal strength is a concern, opt for an epoxy wood filler even though it is more expensive.

Both materials can easily accept a screw, but the epoxy wood filler is stronger and a better option for heavier loads.

Check this DAP wood filler on Amazon.

Can Epoxy Wood Filler Secure Screws?

Do-it-yourself home furniture repair, giving old things new life concept image

Is epoxy any good at doing the task of holding onto those screws now that we know they can be screwed into? Well, that depends on how big the job is.

Wood filler won't be able to cling onto those screws if it is going to support significant weight, such as door hinges, for instance.

Epoxy wood fillers could break down if you try to support a heavy door with them. However, it works well for holding screws firmly in smaller or less weight-bearing tasks. 

Epoxy has several benefits, one of which is that even after it has dried, a small amount of elasticity remains. And when it comes to wood, having a wood filler that can provide a little give is crucial.

Wood breathes. In response to temperature fluctuations, it stretches and contracts, and even a small amount of moisture in the air, such as on a humid day, can cause wood to move.

Even sturdy wooden doors can come completely off their hinges in circumstances with excessively high humidity levels.

Can You Cover Screws With Wood Filler?

Yes. Using wood filler is a fantastic option if you intend to paint your project. To maximize tool control, spread a little quantity of wood filler over the screw and hole using a narrow-width putty knife blade.

With the blade, spread the filler until it is flush with the wood's surface. To allow the filler to set, allow it to dry according to the brand's directions. Sand and paint after that.

Use this method solely for interior pieces and remember our prior explanation about environmental variables causing cracking. 

Does Wood Filler Last Long?

Plastic bottle of carpenter with wood dripping on the wooden background

Yes, wood filler is durable. As previously said, it dries swiftly and solidly. One brand mentioned above can harden in only a half-hour and dry in as little as 10 to 15 minutes before being sanded.

With those timeframes, the fulfillment of your work won't be delayed, whether it's a real venture or a restoration job. 

Final Thoughts

Sealing cracks in old garden table with acrylic putty

We've enlightened you on the many wood filler options, as well as when and how to use them. Epoxy filler is the most effective wood filler for keeping screws. You shouldn't have any trouble screwing into this specific type of wood filler.

But don't expect epoxy to carry a lot of stress if, for example, you filled a large knot hole with it and used it to secure a structural screw.

Here are more related articles that you may want to read:

8 Best Wood Fillers For Large Holes

How Long Does It Take For Wood Filler To Dry?