I Tested 10 Wood Fillers on My Old Floors — Here Are the 4 That Worked Best

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Old hardwood floors have character, but some of that “character” is harder to love when it comes in the form of cracks, gouges and gaps between boards. Wood filler can make those imperfections far less noticeable, provided you choose one that suits your floor, the repair and your skill set.

I tested 10 options to find the best wood filler for hardwood floors, comparing how easy they were to apply, how well they filled different types of damage and the finish they left behind. Four stood out from the rest, including options for everyday repairs, more serious damage and projects where stainability matters. Here’s how they performed and what you should know before filling your own floors.

What Type of Wood Filler Should You Use on Hardwood Floors?

Wood fillers differ in more than consistency. The base formula can affect how you apply the product, how hard it becomes and what you can do with the surface afterward.

Water-based and latex formulas are generally approachable choices for common household repairs. Solvent-based products cure to a harder finish, making them useful when durability matters. Two-part epoxy fillers are better suited to treat substantial damage where you need a tough repair rather than a cosmetic touch-up.

The 4 Best Wood Fillers for Hardwood Floors

Not every damaged floor needs the toughest product you can find. These four stood out because each offered something useful for a different type of hardwood repair.

1. Best Water-Based Wood Filler: GoodFilla Wood and Grain Filler 

GoodFilla is my pick for a versatile water-based option, particularly if you have several smaller repairs to tackle. The manufacturer specifically recommends it for deep grooves in hardwood floors, and the thicker consistency works for cracks and other imperfections. It can also be sanded and accepts stains and finishes, giving you flexibility when refinishing the surrounding wood.

Key Features

• Water-based formula: The filler contains no acrylic or latex emulsions.
• Customizable finish: You can stain the dried filler or mix it with tint, stain or dye.
• Easy sanding: The formula sands smoothly without obscuring the surrounding grain.
• Reusable material: The dried product in the container can be reconstituted with water.

Get GoodFilla Wood and Grain Filler on Amazon

2. Best Stainable Wood Filler: Minwax Stainable Wood Filler

Color matching can be one of the hardest parts of filling hardwood floors. Minwax Stainable Wood Filler earned its place because its latex formula is specifically designed to accept both oil- and water-based wood stains. It works best on unfinished wood with relatively small defects, such as cracks, nail holes and shallow gouges.

Key Features

• Stainable surface: The formula accepts penetrating wood stains.
• Versatile compatibility: You can use oil- or water-based stains over it.
• Simple application: Press the filler into the damaged area with a putty knife.
• Sandable finish: Once dry, the repair can be sanded flush with the surrounding wood.

Get Minwax Stainable Wood Filler on Amazon

3. Best Epoxy Wood Filler: Rmolitty Epoxy Wood Putty Filler

Some floor damage needs more than a lightweight filler. Rmolitty Epoxy Wood Putty Filler is a two-part option that makes more sense for substantial repairs where you want the strength and hardness associated with cured epoxy.

The trade-off is a more involved application. You have to combine the two components rather than scoop filler straight from a container, so this isn’t the product I’d reach for to fix every tiny crack across a room. Save it for repairs where an epoxy formula’s strength makes the additional work worthwhile.

Key Features

• Two-part formula: The separate components combine before application.
• Heavy-duty option: Epoxy suits more demanding repairs than minor cosmetic filling.
• Moldable consistency: You can shape the material to fit irregular damage.
• Hard finish: The cured repair creates a solid surface for subsequent finishing.

Get Rmolitty Epoxy Wood Putty Filler on Amazon

4. Best for Severely Damaged Hardwood Floors: DAP Plastic Wood Filler

DAP Plastic Wood Professional Wood Filler was the standout for floors with more obvious damage. This solvent-based filler contains real wood fibers and hardens into a durable repair that you can sand, cut, drill, stain, varnish or paint after it dries. That versatility makes it particularly useful for deeper gouges and damaged sections where a simple cosmetic patch isn’t enough.

Key Features

• Solvent-based formula: The filler cures into a hard, durable repair.
• Real wood fibers: Its formulation is designed to look and behave more like wood.
• Multiple finishing options: You can sand, stain, varnish, paint or lacquer the dried filler.
• Fast drying: Shallow repairs can dry in as little as 15 minutes.

Get DAP Plastic Wood Filler on Amazon

How to Prepare Hardwood Floors for Wood Filler

A good filler can still result in a disappointing repair if dirt, loose wood or moisture gets trapped during application. Proper preparation also gives you a chance to inspect the surrounding floor and determine whether you’re dealing with an isolated imperfection or broader damage.

Removing accumulated dirt and debris matters for long-term floor care. Avoid using harsh chemicals and try a tea bag instead. The tea naturally cleans your wooden floors without leaving a legacy of volatile organic compounds, unlike some commercial cleaners. When your floors are updated, protect the lasting finish with mats and rugs in high traffic areas, avoiding high-heeled shoes in the house and ensuring pet nails remain short.

Before opening your filler, prepare the repair area with these steps:

• Clean the damaged area: Remove dirt, grease and residue from the wood.
• Clear loose material: Carefully remove splinters, crumbling wood and debris from the damaged spot.
• Sand where necessary: Smooth rough edges without unnecessarily enlarging the repair.
• Remove the dust: Vacuum or wipe away sanding residue so the filler contacts the wood.
• Let the floor dry: Make sure the repair area is completely dry unless your chosen product specifically allows application to damp wood.

How to Apply Wood Filler to Hardwood Floors

Application is vital to the success of your DIY adventure. Take your time and ensure you do it correctly.

Step 1: Choose the Right Filler

Match the product to your repair before you start. A shallow scratch, narrow crack and deep gouge may each benefit from a different formula. Check the manufacturer’s instructions for maximum repair depth, recommended surfaces and finishing compatibility.

Step 2: Press the Filler Into the Damage

Use a putty knife to push the filler firmly into the crack or gouge. Work the material into the damaged area rather than simply spreading it across the top.

Step 3: Remove Excess Filler

Scrape away unnecessary material from the surrounding floor. Some products recommend building the product slightly above the wood so you have enough material to sand perfectly flush after drying.

Step 4: Let the Filler Dry

Give the filler its full recommended drying or curing time. Deeper repairs may take considerably longer than shallow ones, and some products require multiple layers rather than one thick application.

Step 5: Sand the Repair Smooth

Once the filler has completely hardened, gently sand the area until it’s level with the surrounding floor. Remove all wood dust before moving on to stain or another finishing agent. Consider applying a clear lacquer to seal and finish the whole floor.

Sand and Stain for a More Natural Finish

Even a “stainable” wood filler may not absorb color exactly like the surrounding natural boards. Test your chosen stain over a dried sample of filler first, especially if you’re repairing a prominent area. Sand the repair flush, clear away the dust and apply your stain and protective finish according to the manufacturer’s directions. Taking a little extra time here can make the difference between a patch that catches your eye and one that blends into the floor. Always start with a coarse or lowest-grit paper and work your way to a fine-grit for a smooth finish.

Frequently Asked Questions About Hardwood Floor Filler

Satisfy your curiosity about floor fillers and how to get your floor pristine with these questions.

What’s the difference between wood filler and wood putty?

Wood filler typically dries hard and is designed for repairs that you can sand and finish. Wood putty generally remains more pliable and is commonly used to conceal small imperfections in already finished wood. Check the individual product instructions, though, since manufacturers sometimes use terms such as “filler” and “putty” differently.

Can you stain wood filler to match your floor exactly?

You can stain many wood fillers, but an exact match isn’t guaranteed. Filler and natural wood absorb stain differently, so the same color may look lighter or darker over the repaired spot. Test the stain over a dried sample of your filler before committing to a visible section of flooring.

Should you apply wood filler before or after sanding hardwood floors?

Apply filler before your final sanding. You can complete an initial sanding to expose and prepare damaged areas, then add the appropriate filler and allow it to dry completely. Sanding afterward lets you bring the repair flush with the surrounding boards before staining or applying the final finish.

Make Your Hardwood Floor Repairs Last

The best filler isn’t necessarily the hardest or fastest-drying product on the shelf. It’s the one that matches the damage you’re repairing and the finish you want afterward. A stainable filler can help disguise everyday cracks and gouges, while a tougher solvent-based or epoxy product may suit more substantial damage. Give the preparation, drying and finishing stages just as much attention as the filling itself, and those battle scars in your old hardwood floors can become much harder to spot.