Polyurethane Dries In 2-24 Hours And It Will Take 30 Days To Fully Cure.
Polyurethane is a type of finish that is commonly used to protect wood surfaces and add a glossy or matte finish. It is known for its durability and resistance to scratches, scuffs, and stains, making it a popular choice for both residential and commercial applications.
One of the top questions that I get when it comes to hardwood floors is how long will it take for polyurethane to dry (hardwood floors)? Polyurethane takes 2- 24 hours to dry depending on the type of polyurethane. Oil-based polyurethane takes around 8 hours between coats. Whereas water-based polyurethane could be dry within 2 hours.
In this post, I’ll explain what polyurethane is, as well as answer your question “how long does polyurethane take to dry?” as well as a few other useful tidbits concerning polyurethane. Let’s jump right it.
What Is The Drying Time For Polyurethane?
The drying time of polyurethane can vary depending on a number of factors, including the type of polyurethane used, the humidity and temperature of the room, and the thickness of the coat applied. In general, it takes about 24 hours for a single coat of polyurethane to dry completely. However, it is recommended to wait at least 48 hours before applying a second coat, to allow the first coat to harden.
The type of polyurethane can also affect the drying time. Water-based polyurethane typically dries faster than oil-based polyurethane, with a drying time of about 2-4 hours. Oil-based polyurethane, on the other hand, can take anywhere from 6-8 hours to dry completely. It is also worth noting that oil-based polyurethane has a stronger odor and takes longer to clean up, as it requires mineral spirits or paint thinner to remove any excess or spills.
The humidity and temperature of the room can also affect the drying time of polyurethane. In general, polyurethane dries faster in a warm, dry environment with good air circulation. On the other hand, if the room is humid or the temperature is too cold, the drying time may be longer. It is important to follow the manufacturer’s recommendations for the ideal temperature and humidity range for applying polyurethane.
The thickness of the coat applied can also affect the drying time of polyurethane. A thicker coat will take longer to dry than a thin coat. It is important to follow the manufacturer’s recommendations for the recommended number of coats and the thickness of each coat to achieve the best results.
Your new hardwood floors are stunning. The next thing that you need to do is decide on the polyurethane varnish that you are going to use. If you are still unsure of what is the best polyurethanes to use on your floors then make sure you read the best polyurethanes for hardwoods. Now that we are at this phase of the project, you need to understand that once you have your polyurethane installed, you need to let your floors completely dry, then you need to allow your floors to cure.
What Is The Difference Between Drying vs. Curing Time Of Polyurethane
Drying time is simply the period between the coats of polyurethane that you apply to your flooring. For all intent and purpose, Polyurethane varnish is considered to be “dry” when the surface is no longer tacky to the touch and no longer appears to be wet. You can now install another coat of polyurethane.
Most flooring experts will tell you that you can now gently walk on the floor. My suggestion is to add another 5 days before you re-introduce light traffic to your newly varnished hardwood floors.
You run the risk of creating blemishes under the top layer. Keep in mind that the top surface may be dry, but below the surface has not been cured yet, hence it is not fully dry to the core. Do not put furniture or heavy items in this space until the space has fully cured.
How Long Does It Take Water Based Polyurethane To Dry
How long does water-based polyurethane take to dry vs. oil base polyurethane? Water based polyurethane drying times vary from as little as 2 hours. After this, you should be able to touch the surface. Dry time should be used to measure the time between coats of polyurethane. I do not recommend that you use the space or reintroduce traffic to the flooring that you just finished. It will take up to 21 days for water-based polyurethane to cure.
How Long Does It Take Oil-Based Polyurethane To Dry
Oil-based polyurethane drying time is at a minimum of 4 hours if you are using a fast-drying formula. Most oil-based finishes will dry within 12 to 48 hours. This is the time between applying coats of polyurethane. Curing will take 30 days. Using your floors prior to this may result in damage to the underlying surface. Also keep in mind, that oil-based polyurethane has a violative VOC and you should not be in the space for at least 4 days.
How Long Does Polyurethane Take To Cure
Curing takes approximately 3 to 30 days based on the types of polyurethane.
- Water-based polyurethane takes 3 days to 21 days.
- Oil-based Polyurethanes takes between 21 to 30 days
| Polyurethane | Water-Based | Oil-Based |
| Time between coats | 8 hours | 24 hours |
| Dry to touch | 24 hours | 48 hours |
| Ready to place things | 2 days plus | 4 days plus |
| Completely Cured | 20 days | 30 days |
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Final Thoughts
In summary, it takes about 24 hours for a single coat of polyurethane to dry completely. However, the drying time can vary depending on the type of polyurethane used, the humidity and temperature of the room, and the thickness of the coat applied. It is important to follow the manufacturer’s recommendations and allow sufficient drying time before applying a second coat or using the surface
Related Polyurethane And Refinishing Hardwoods Post
- 13 Best Polyurethane For Hardwood Floors
- Water Based Vs. Oil-Based Polyurethane Floor Finish -The Pros & Cons
- Which Polyurethane Doesn’t Yellow?
- Hardwood Flooring Trends
- Best Vacuums For Hardwood Flooring
