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Will Polyurethane Fill Cracks In Wood Floor?

Will Polyurethane Fill Cracks In Wood Floor?

Polyurethane acts the most durable  over wood floor finish. If you want natural color wood  water-based polyurethane is the best option for you. Water-based polyurethane over wood floor save floor from damp damage. If your floor absorb moisture apply water-based polyurethane to prevent dampness. Let's see how to use  polyurethane fill cracks in wood floor?

Will polyurethane fill cracks in wood floor?

Polyurethane protects the wood from the scratches and everyday spills.  Polyurethane widely use to fill in cracks in wood floor. Normally blending polyurethane with sawdust used to  fill cracks in wood floor.   Polyurethane or sawdust mixer smoothly fill cracks and crevices without damaging wood floors. Another way to fill cracks in wood floor is by using silicone rubber. It offers total protection to the wood floor, it maintains its shine, and you can sand it pretty easily while keeping your wood floors looking green.

Can you use polyurethane as a filler?

Yes, you can use polyurethane as a filler. Normally polyurethane or sawdust mixer smoothly fill cracks and crevices of wood floors. Apply few drops of polyurethane on cracks surface. Wait few hours to cure surface then apply clear hard resin. It will harden and fill cracked surface. Use sandpaper to smoothen rough surface.

How to fill cracks with polyurethane on a floor?

While humidity may affect on your floor as a result floor start  cracks. if the cracks and  humidity not control floor lifespan will decrease. Here are some several methods to fills crakes.

Use gap fillers:

One of the easiest methods to fill cracks in wood floor is using gap filler. These gap filler mostly use as a sealer and protect wood from water and moisture. Some of the gap fillers used for wood construction project, there are polyurethane, epoxy, sealer, lacquer and other glues. If you don't know the proper method to fill cracks in wood floor, then consult a professional. Some people think that polyurethane is only good for applying sealer in wood floor. But actually polyurethane for wood floors are more effective than other methods. If you want to cover the cracks on your wood floors then polyurethane is perfect choice for you. Normally mixing sawdust with polyurethane is most common way to fill cracks in wood floor .

Will Polyurethane Fill Cracks In Wood Floor?

Strips of wood:

If cracks in your wood floor more than two inches then strips of wood are the best way to fill cracks. Strips of wood are mostly used to cover the cracks in hardwood and laminate floors. If your floor have a lot of long and deep cracks, then use strips of wood, this will save your time and money. You can buy strips from home depot or lumber store. But make sure you check the size of your crack before purchasing it.

Block filler:

If you want to make your wood floors more beautiful, then use blocks as a filler. Blocks are commonly used as pattern blocks, fence blocks and other building material. Block filler is perfect for filling in small crack in your wood flooring. If you paint your wood floors, then polyurethane is best choice for you. Polyurethane  produce a strong seal when applied on a wood surface, due to this polyurethane play most significant role in filling cracks in wood floor .


If your wood floor's crack too much then rope the perfect alternative for you to fill cracks in wood floor. Rope is most durable filler for long time. You can buy rope from any hardware store.


It is the most common filler for cracks in wood floor. Most of the people advice to put saw dust and polyurethane to fill cracks in wood floor. Polyurethane is a kind of liquid, mostly use after finishing your wood floors. If you want to protect your floors from scratches then polyurethane can be a best option for you. Polyurethane sealer applied over the surface give a tough protection layer on it. Normally polyurethane applied over the surface create a barrier between wood and liquid. If your wood floors absorb moisture, then you can use polyurethane to seal it. This is the main reason to fill cracks in wood floor with sawdust and polyurethane .

Whole floor replacement:

If you find cracks on your wood floor and they are more than two inches deep then better to change them with new wood floors. If your wood floors are shallow, then use polyurethane and saw dust as a filler or put strips of wood.

Cracks surface:

If you find cracks on the surface of your wood floors, then use polyurethane as a preventative measure. You can apply polyurethane on the first day of installing new floors, if you don't want to damage the floor surface.


Use polyurethane as a sealer for your wood floors. Applying polyurethane after finishing wood flooring will give strong protection layer on it. If your floors are new, then use polyurethane to prevent the moisture attacks on it. Polyurethane is the best product to fill cracks in wood floors.

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