For all the things we love about polyurethane, the wait time isn’t one of them. So it is natural to want to know how long to wait between coats of polyurethane on hardwood floors so you can plan your time better.
Is it long enough for you to go pick your kids up from school, head to the gym, or plan your wedding?
Fortunately, the wait times have improved significantly over the years. So, depending on the product you use, you might be in for a pleasant surprise.
How Long Should you Wait Before Applying the Next Coat of Polyurethane on Hardwood Floors?
If you use water-based polyurethane, you only have to wait between 2 to 4 hours before applying the next coat. However, when using oil-based polyurethane, you might wait for 10 to 24 hours. You can apply the next coat in as little as 4 hours if you are using fast-drying, oil-based polyurethane.
How Many Coats of Polyurethane Should I Apply on Hardwood Floors?
So, how many layers of polyurethane to add?
You should apply at least three coats of polyurethane on hardwood floors. Of course, this will depend on the type of polyurethane you are using.
Oil-based polyurethane will rarely need more than three coats on floors. Hardwood floors are high traffic areas, so you need a nice, thick layer to protect the wood for years.
On the other hand, when applying water-based polyurethane to wood floors, you might need to apply four or five coats. This is because water-based polyurethane tends to raise the grain of the wood, which is one reason why you may have to apply several more coats before you get a smooth finish.
Read also: What to do when polyurethane does not dry.
Do I have to Sand Between Coats of Polyurethane on a Hardwood Floor?
You should always sand between coats when applying oil-based polyurethane on hardwood floors.
However, you may not need to sand between coats when using water-based polyurethane, depending on the brand of product you buy. This is especially true if you want to avoid the risk of a cloudy polyurethane finish.
Sanding helps to get rid of bubbles, dust nibs, and lint. It also makes it easier for subsequent coats to stick.
While sanding does the same for water-based applications, it isn’t as necessary. As long as the surface remains clean and free from dust, you can tack it and apply the next coat without abrading the surface.
When you apply the next coat of polyurethane within ten hours, it will stick to the previous one just fine. I should mention that you can also do the same for oil-based polyurethane, but it’s better to play it safe.
Sanding between coats of polyurethane is the only way to properly get rid of dust and other impurities that show up. Yes, it takes more time, but it gives a higher quality finish at the end.
Related read: What happens if you don’t sand between coats of poly?
What is the Best Applicator for Polyurethane on Hardwood Floors?
The best tool for applying oil-based polyurethane on hardwood floors is a lambswool applicator. It has a reasonable absorption rate, doesn’t leave as much lint as the competitors, and gives a smooth finish.
However, you have to prepare the applicator properly by removing excess lint before using it. If you don’t, you’ll ruin the floor before you even begin.
When it comes to water-based polyurethane, the T-bar is the best applicator. Also called a snowplow, the T-bar does a great job of spreading the water-based polyurethane without absorbing too much of it.
It is very popular because it does not leave any lint or bubbles.
In place of a T-bar, you can also use a microfiber roller to apply water-based polyurethane. This is the best option when applying the finish on floors with complex designs, such as parquets.
How Long do I have to Wait for the Stain to Dry Before Applying Polyurethane?
This depends on the type of wood stain. Penetrative wood stains take about 48 hours to dry on the surface. Non-penetrative wood stains on hardwood floors take about two weeks to dry completely.
Latex stains are the slowest of the bunch. You should wait at least three weeks before applying polyurethane to this type of stain.
Check out our article on “How long does polyurethane take to dry” for more info on poly drying time.
Which Type of Polyurethane is Best for Hardwood Floors?
This will depend on the type and color of the hardwood floors:
- Water-based polyurethane can be used on any hardwood floor because it dries clear and does not change color over time, unlike oil-based polyurethane.
- Oil-based polyurethane has a yellowish or amber tint, which gets darker over time.
So, in general, people prefer to use oil-based polyurethane on dark floors.
However, the yellow tint can, in some cases, add more life to the wood. As a result, it is not uncommon to find people applying oil-based poly on light woods like maple.
If you are concerned that the wood looks too dull, you might want to use oil-based polyurethane. (Find out how to tint polyurethane in our guide.)
Another thing to consider when picking a polyurethane finish for hardwood for floors is the luster. The most common sheens are satin, semi-gloss, and high gloss. Many people like high gloss finish on their floors.
The problem with water-based high-gloss finish is that it shows scratches easily.
This may not be a problem in the first year or two, but the flaws will become more evident after that.
Due to its yellowish tint, oil-based polyurethane does not have the same issue with a high gloss finish. So use a clear coat that won’t yellow.
When will the Hardwood Floor be Ready for use After Applying Polyurethane?
You should typically wait at least 48 hours before you start bringing in furniture and walking on the floor after applying polyurethane. Then again, this also depends on the type of polyurethane you used.
Water-based polyurethane usually dries completely in two days, but oil-based polyurethane needs about two weeks.
After a couple of days, you can walk around with socks on a floor coated with oil-based polyurethane but try not to put any furniture on it for at least a week.
In some cases, oil-based polyurethane needs about thirty days to cure before use.
Interesting read: Can you spray urethane over lacquer primer?
As you can see, how long you have to wait between coats of polyurethane on hardwood floors depends on the product you use.
It can take as little as 2 hours with water-based polyurethane or 24 hours with regular oil-based polyurethane.
Of course, the wait time will also depend on the product you use. To know more, check out our reviews of the best water-based polyurethane for hardwood floors and the best oil-based polyurethane for hardwood floors.