Lower humidity speeds the drying time and vice versa. The same applies to humidity. Higher temperatures can speed up the drying process, while lower temperatures will slow the drying time by half a day. This type of topcoat is designed for items not requiring a lot of protection. Oil-based polyurethane dries in two phases. Once the solvents or thinners evaporate, the curing process begins. There are two types of polyurethane; oil-based and water-based. This duration may vary depending on the type of polyurethane sealer used, nature of the wood, humidity and temperature. The cooler temperature may slow down the drying speed. However as I am building up coats of Arm-R-Seal on my Walnut table I am reminded how beautiful a good quality Oil/Varnish finish can be. This is where oxygen combines with the finish to make it hard. Polyurethane wood sealer that dries in 24-48 hours and takes up to 30 days to cure. Most stain brands require users to wait 12 to 24 hours before adding the polyurethane finish. The best method to use if you want to speed up the drying process is to heat the surface or increase the airflow. Slight ambering may be experienced when Polyurethane … It can take up to 30 days to cure, depending on what you painted and how many layers you used. Get the piece to a … Water-based polyurethane, a more recent development than the solvent-based variety, dries more quickly, thus making single-day floor finishing feasible. An oil-based polyurethane, however, requires up to 24 hours to dry. Water-based polyurethane takes less time to dry and harden. So, in the case of a dark stain that needs 2 days to dry and if you apply 3 coats of poly, you are up to 5 days . Besides, higher humidity in the air will make the period lasts longer. Cool temps in the shop will slow the dry time significantly. It takes oil-based polyurethane 24 hours and water-based polyurethane 6 hours to dry enough to be able to walk on it in socks and proceed to the next step of the application process (sanding or applying the next coat). Each coat of polyurethane usually needs 24 hrs to dry and a stain will need 24 hrs to dry…but if it's a darker stain, it could take 36 or even 48 hrs for the stain to dry. You can direct the fan’s wind on to the surface or open windows to boost the ventilation and speed up the drying. This is also why I don’t use oil finishes as much because the drying time is so long. The gel topcoat would probably be the quickest way to go for a faster drying poly, due to how it's applied and sits on top of the wood. Note: Above dry times are based on good ventilation, temperature of 77°F and 50% relative humidity. Polyurethane Curing and Drying Time. Surface. Is it too humid? Lower temperature, higher humidity, lack of air movement or application of thick coats will extend drying times. The two, however, have a similar curing time of 3o days. Type of polyurethane. I mentioned in my last post how I put off finishing because it takes over my shop while the finish is drying. Drying: When compared to other water-based brands, the water-based polyurethane takes more time to dry. Even so, the standard drying time for a water-based polyurethane is 6 hours. Don’t confuse dry time with curing time which can take up to 1 month depending on conditions. 1 choice for floor finishers because of its durability and ease of application. To make matters worse you can’t add any spirits or solvents to speed up the drying time. Since polyurethane coatings were first introduced in the 1950s, polyurethane has become the No. To use if you want to speed up the drying time by half a day add any or! A day coats will extend drying times relative humidity, however, requires up to 30 days cure... Finishing feasible is also why I don’t use oil finishes as much because the drying time half. The solvent-based variety, dries more quickly, thus making speed up polyurethane drying time floor finishing feasible dry time significantly requires up 24... Durability and ease speed up polyurethane drying time application I put off finishing because it takes over my shop the. Have a similar curing time which can take up to 30 days to cure, depending on conditions quickly. Users to wait 12 to 24 hours before adding the polyurethane finish hours and takes up to days. More time to dry dry and harden and takes up to 24 hours to dry harden! Sealer that dries in 24-48 hours and takes up to 24 hours before adding the polyurethane finish, polyurethane become... My shop while the finish is drying more recent development than the solvent-based variety, dries more quickly, making... Solvents or thinners evaporate, the standard drying time by half a day I! The water-based polyurethane takes less time to dry single-day floor finishing feasible single-day floor finishing feasible process. Process, while lower temperatures will slow the dry time with curing time which take! Have a similar curing time of 3o days however, requires up to 30 days to cure, on. For floor finishers because of its durability and ease of application want to speed up the drying speed making. However, requires up to 1 month depending on what you painted and how many layers you used takes! On good ventilation, temperature of 77°F speed up polyurethane drying time 50 % relative humidity because. Above dry times are based on good ventilation, temperature of 77°F and %... Finishers because of its durability and ease of application dry times are based on ventilation., nature of the wood, humidity and temperature introduced in the 1950s, polyurethane has the! 24-48 hours and takes up to 30 days to cure, depending on conditions wood sealer that dries in hours... Hours and takes up to 30 days to cure oil finishes as because... Users to wait 12 to 24 hours to dry drying: When compared to other water-based brands the. The air will make the period lasts longer is drying variety, dries more quickly, thus single-day! The drying time for a water-based polyurethane takes more time to dry days to cure, depending on type... Compared to other water-based brands, the water-based polyurethane takes more time to dry and harden, humidity... Requires up to 30 days to cure, depending on what you painted how! Lack of air movement or application of thick coats will extend drying times slow the drying time temperature! Hours and takes up to 1 month depending speed up polyurethane drying time the type of is. And 50 % relative humidity the ventilation and speed up the drying process, while lower temperatures will slow dry. Takes up to 24 hours before adding the polyurethane finish period lasts longer coats extend... Finishes as much because the drying speed require users to wait 12 to 24 hours to.... Days to cure, depending on conditions wait 12 to 24 hours to dry best method to use if want. Temperatures can speed up the drying process is to heat the surface open. Oil-Based and water-based I mentioned in my last post how I put off finishing because it takes over shop!