Polycrylic must dry and cure before you can use and clean it. So, how long does polycrylic take to dry?
It takes polycrylic 30 minutes to 2 hours to dry. On average, polycrylic dries to touch in 30 minutes, and you can re-coat polycrylic within 2 hours. However, it takes polycrylic 24-72 hours to cure.
Polycrylic dries faster than most sealants because it has a water-based nature.
Polycrylic Dry Time Between Coats
It takes polycrylic 2 hours to dry between coats. This allows polycrylic coating to harden enough, supporting the next coating without cracking.
For polycrylic to dry, the paint solvent (water) must evaporate. Since polycrylic uses water as its solvent, the water will evaporate faster than oil-based paints. Once the solvent evaporates, the paint particles start to harden and bond (the curing phase begins). This means the polycrylic coating is hard (strong) enough to handle another coating.
If you re-coat polycrylic too soon, the solvent (water) will be trapped inside the existing coat. As a result, the solvent will start to bleed through and prevent the new coat of polycrylic from sticking properly. This causes the second coating to peel off or turn sticky.
To know if polycrylic is dry enough for a re-coat, feel the texture of the sealant. If the polycrylic coating is still wet (or sticky), the sealant hasn’t dried yet, and you shouldn’t re-coat it. On the other hand, if the polycrylic coating has a dry textured finish, the polycrylic is dry, and you can re-coat it.
So, polycrylic re-coat time is 2 hours. However, the dry time of polycrylic depends on the temperature, thickness of the coat, and humidity levels. If the temperature is cold and the humidity levels are high, polycrylic takes longer to dry. Also, a thick coat of polycrylic takes longer to dry than a thin coat.
Polycrylic Cure Time
It takes polycrylic 24-72 hours to cure. On average, you can lightly use a polycrylic finish after 24 hours and clean it after 48-72 hours. The curing time refers to the length of time to wait before you can use, clean, or wash the polycrylic finish. The curing process starts once the paint solvent (water) fully evaporates.
Polycrylic cures through oxidization. Oxidization is when the paint particles react to oxygen and start to harden and become compact. The longer it takes polycrylic to cure, the more paint particles harden and become compact. The more compact the paint particles are, the more durable the polycrylic is.
If you wash polycrylic before curing, the finish becomes water-logged and can remain tacky for several hours or days. That’s because the paint particles haven’t fully hardened, so the finish isn’t water-resistant yet.
Under normal conditions, the evaporation and oxidization of the polycrylic will be completed within 72 hours. However, the room temperature and humidity levels can affect the polycrylic curing time.
How To Speed Up Polycrylic Drying Time?
You can make polycrylic dry faster by using a hairdryer, increasing air circulation, or using a dehumidifier.
Method 1: Use a Hairdryer
Polycrylic dries through evaporation, so increasing the evaporation rate will speed up the dry time of polycrylic. To increase the evaporation rate, use a hairdryer. The hairdryer will increase the heat around the polycrylic coating and the evaporation rate.
Here’s how to do it:
- Turn on The Hairdryer – You can also use a heater or a radiator.
- Use medium Temperature – You shouldn’t use the maximum temperature of a hairdryer as it can dry the polycrylic too fast and crack it.
- Move the Hairdryer Around – You must move the hairdryer around the polycrylic coating. Don’t heat one spot one than others.
- Turn off the Hairdryer – You shouldn’t fully dry the polycrylic as it can develop cracks. If the polycrylic dries too fast, the paint particles won’t harden naturally.
Method 2: Increase Air Circulation
To speed up the curing time of polycrylic, increase the air circulation. The more air circulates over the polycrylic coating, the faster the sealant dries and cures.
To increase air circulation:
- Open all doors and windows to allow cross ventilation.
- Turn on fans in the room to move air quickly through the polycrylic paint coating.
- Open the air vents if the room has one.
Method 3: Use a Dehumidifier
Since polycrylic is water-based, the evaporation rate will be slowed down if there is moisture in the atmosphere. If polycrylic is applied in humid or wet conditions, the sealant will take hours to even dry to touch.
However, a dehumidifier will help reduce the atmosphere’s moisture content.
Here’s how to do it:
- Set the Dehumidifier – The humidity levels in a room must be less than 50% for paint (or sealant) to dry. So, set up the dehumidifier to lower the humidity at that range.
- Let the Dehumidifier Running – You must let the dehumidifier run until the sealant or paint dries.
Other tips that can help polycrylic dry faster include:
- Applying thin coats of polycrylic.
- Letting existing coats dry before re-coat.
- Applying the polycrylic in the least humid conditions.
- Applying the polycrylic paint when the weather feels warm or hot.
Tip: You shouldn’t use Japan drier for polycrylic because it’s best suited for oil-based paints, while polycrylic is water-based.
Related Read: Do You Need To Sand Coats of Polycrylic?
Polycrylic Dries Hard
Though water-based, polycrylic forms a hard and thick film when dry. However, the hardness of the polycrylic depends on the finish type you choose. Satin polycrylic has the least gloss on its formula, and the finish isn’t too glossy.
Medium and high-gloss polycrylic forms a hard glossy finish that prevents water and moisture from penetrating the finish. Polycrylic is a polymer that contains resins like polyacrylates (or acrylic resins) and even urethane compounds. These compounds undergo oxidization and cure to become a hard water-resistant polycrylic finish.
However, polycrylic is not as hard as polyurethane. This is because polycrylic has a very low level of paint chemicals and synthetic additives compared to polyurethane. As such, the finish, when dry, is not as hard as polyurethane but is still hard enough to last over ten years if applied correctly.
Related Read: Can You Paint Over Polycrylic Paint?
Compared to other sealants, polycrylic doesn’t take long to dry. On average, polycrylic takes 2 hours to dry enough for a re-coat, and the cure time for polycrylic is 24-72 hours.
However, you can speed up the dry time of polycrylic by using a hairdryer, a dehumidifier, or by applying thin coats.