is it better to use wood filler or caulk?

When it comes to filling gaps in wood trim and other projects, you have a few options. Wood filler can do the job of filling small holes and cracks, but it has some limitations.

Caulk is also great for filling spaces between two pieces of wood, but is better suited for bigger gaps where wood filler won’t work as well. The following comparison will help you decide which one is best for your project!

Is wood filler better than caulk?

Is wood filler better than caulk? Caulk is better than wood filler? The answer depends on your projects and preferences. Both products are widely used for filling gaps in wood, but each has its own set of benefits and drawbacks.

What do you use to fill gaps in wood trim?

  • Caulk. You can buy caulk at the hardware store or even from your local grocery store in a pinch. To use it, you’ll either want to put it on with a caulking gun or spread it out with a paintbrush and then smooth it down with your finger or some scrap wood.
  • Wood filler. This is similar to caulk but tends to be softer and more clay-like than rubberized (which is what caulk is made of). It’s also usually cheaper than caulk, though we’ve seen some brands of wood filler that cost as much as $10 per tube! The main difference between wood putty/filler and wood glue is that they don’t have any adhesive properties; they just fill holes in wood trim.

If you have access to both types of products—and if so we recommend always using one over the other—you should choose which one based on how big the gap needs filling: If there’s just an indentation but no crack running through your trim boards (e.,g., if someone accidentally bumped into them by accident), then go for a small amount of caulking rather than trying to fill up all those little dents individually with putty first before smearing them together afterward like peanut butter onto bread slices; otherwise if there are multiple cracks running across several boards at once then try using glue instead because this will hold them better together without leaving gaps between each section where moisture could get trapped inside later when raindrops fall onto unprotected areas during wintertime rainy days where temperatures drop below freezing point outside

Can you use caulk on wood?

No, caulking is not the best choice for filling gaps in wood. It will wear out over time and may crack or pull loose from the joint, especially if it’s a doorjamb or window frame.

Caulk is better suited for sealing around windows and doors where it keeps out moisture and insects. You’ll also find caulking helpful when insulating bathtubs, showers or toilets because it can, help block out moisture that causes mold growth inside these fixtures.

What works better than wood filler?

  • Use a filler that is made for the specific type of wood you are working with. There are fillers designed specifically for hardwoods and others designed for softwoods. It’s important to use the correct kind of filler because if you use the wrong one it could damage your project or even cause it to crack later on.
  • Use a filler that is designed to fill larger gaps. If your gap is too large and you try using a thinner-bodied product like caulk, chances are it will just squish out through the sides of your joint when you clamp it together again (you’ll know what I’m talking about if this has ever happened). Get yourself some good old-fashioned spackle or wood putty instead! They’ll work much better at filling those big ol’ gaps without getting everywhere else in sight when they’re done drying up against each other tightly enough that nothing else can get through there anymore but the air itself (which doesn’t matter because we don’t breathe anyway…right?).
  • Use a filler that’s designed for smaller gaps instead if yours aren’t quite so big—this will give them time before setting up too hard so there isn’t as much risk involved with accidentally hitting them too hard while sanding down afterward.”

What can you use to fill holes in wood?

When it comes to filling holes in wood, the most important thing you should know is that not every hole needs filling. Small holes can be filled with a few layers of wood putty or spackle and sanded smooth.

If the repair is small enough, you may be able to leave it without sanding afterward. Larger holes will require more material to fill them up completely. Here are some tips for choosing between wood filler and caulk:

  • If the hole is in trim around your house (such as baseboard), use caulk instead of filler because it has a better chance of matching the color of surrounding surfaces.
  • Caulk bonds well with both porous and non-porous materials such as metal, plastic, glass, stone, and masonry—so if your repair requires bonding two different surfaces together (like stucco), this would be an ideal choice!

How do you fill cracks in wood with caulking?

To fill cracks in wood with caulk:

  • Use a putty knife to apply a thin layer of caulk along the edge and bottom of the crack in your wood, making sure to leave at least 1 inch between each side of the crack. If there are several cracks in one area, make sure to spread them apart so you can see where they meet before applying caulk.
  • Let dry for 24 hours before sanding down any excess and painting over it as desired (you may need two coats). If you accidentally get any on your hands or clothing during application, use soap and water or nail polish remover (acetone) immediately after washing up with warm water and soap; if this doesn’t remove all traces then try again until you do so

How big of a gap can wood filler fill?

Wood filler can fill larger gaps, but it’s not as strong as caulk.

  • If you have a gap that’s wider than 3/8″, use wood filler.
  • For smaller gaps (less than 1/4″ wide), use caulk.

How to apply wood filler:

  • Sand down the area where you want to add wood filler, removing any splinters or rough spots that might show through once dry.
  • Apply caulk or other adhesive to both sides of the joint or hole and allow it to dry completely before applying the wood filler. This will prevent separation between layers of material once fully dried out in between layers later on down road when using screws or nails after application has been completed successfully without issues occurring due to wetness from moisture being trapped inside crevices during installation process itself.”

How big a gap can caulk fill?

Caulk is usually better for filling smaller gaps, while wood filler is used to fill larger gaps. That’s because caulking guns are designed to dispense caulk into narrow cracks and crevices, while a putty knife can be used to spread wood filler across the surface of a large gap.

Caulk is also better for filling holes in wooden trim or other surfaces where you don’t want the material to show through—for example, on windowsills or around doorframes.

If you’re trying to repair an area that’s been damaged by water damage or rot, caulk will help protect against future problems by keeping out moisture and providing a waterproof sealant between two surfaces.


When it comes to filling gaps or cracks in wood, there are a few different options available. You can use caulk to fill small holes, but it’s not really designed for larger gaps between materials like drywall and wood.

Caulk may also stain surrounding surfaces if left unsealed for too long before being painted over again—a potential problem if you have kids using crayons on the walls or furniture nearby!

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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