Can I apply paint on wet wood? This is a very common question amongst DIYers and here is the answer to that.
You can paint on wet wood as long as you do enough prep work and you use water-based paint. To paint over wet wood, you’ll need to dry the wood as much as you can using paper towels, a hairdryer, and a fan. After, you’ll need to apply two coats of water-based paint on the wet wood.
Since water-based paint uses water as the solvent, the paint will easily soak into the wet wood. Never use oil-based paint on wet wood as the oils in the paint will not stick or be absorbed in the damp wood.
You should know that it’s generally not advised to paint over wet wood. So what happens when you paint wet wood? Let’s find out.
What Happens If You Paint Wet Wood?
When you paint over wood that is wet, the paint will not perform well on the damp wood. This is because there is still moisture inside the wood. The moisture will affect the performance of the paint in different ways.
For starters, paint adhesion will be difficult. For paint to stick well to wood, the wood has to be dry. When you paint over wood that is wet, the moisture in the wood will not allow the paint to stick properly.
Also, the paint can develop stained spots as a result of bleed through. When you paint over wood that is wet, the moisture in the wood is not just water. In most cases, the moisture in the wood is a mixture of water, tannins, and wood oils.
So when you paint over the damp wood, the moisture can bleed through the paint coating resulting in stained spots and patches in the finish. When you paint over wet wood, the paint will be easily affected by moisture, dust, and other factors that can damage the finish.
The moisture in the wood will mix with the paint and thin it. This will make the paint lighter and can lead to runs and drips. Not to mention a very poor paint color when the paint gets dry.
When you paint over wet wood, the paint will take longer to get dry. This is because it’s not just the solvent in the paint coating that will have to be evaporated for the paint to dry. The moisture in the wood also has to be evaporated for the paint to get fully dry and this can take several hours.
Finally, painting over wet wood also means that the paint will not last long. Even if you do enough prep work, the paint will not be durable. Paint that is applied on wet wood will come off with minimum force.
Does Paint Stick To Wet Wood?
Paint doesn’t stick very well to wet wood. This is because the moisture in the wood will prevent proper paint adhesion.
When wood is wet, it means that some of the wood fibers have absorbed water and tannins. The wood fibers that have absorbed water will not be able to absorb the paint since they are filled with water. Since the wood fibers can’t absorb the paint, the paint will not soak into the wood and won’t stick properly.
Instead of sticking properly to the wood, the paint will develop bubbles as the paint mixes with the water in the wood.
However, you can improve paint adhesion so the paint can stick better to the wet wood. To do this, you’ll have to apply a moisture-resistant or waterproof paint primer on the wood before applying the paint.
The waterproof primer coating will prevent the moisture or water in the wood from bleeding through the paint coating. This way, the paint will stick better since it’s being applied on the dry primer coating and not directly on the wet wood.
How To Tell If Wood Is Dry Enough To Paint?
You can tell if the wood is dry enough to paint by testing the moisture content of the wood. You can do this by using a portable moisture meter.
A moisture meter helps to test the moisture content in wood. To use a moisture meter, you need to insert the prongs of the moisture meter deeply into the wood. The prongs are needle-like objects at the top of the moisture meter. After inserting the prongs into the wood, the moisture content of the wood will be displayed on the screen of the meter.
Most paints require a moisture content of less than 15% for the paint to stick properly to the wood. So if the moisture content in the wood is lower than 15%, the wood is dry enough to be painted. For interior wood, it’s better to have a moisture content lower than 12%. This is because the wood wouldn’t be as exposed to the sun or dry air as outdoor wood. So the interior wood will dry slower.
You can also find out if the wood is dry enough to paint by putting a few drops of water on the wood. If the wood is dry, the water will be absorbed in the wood quickly. But if the water remains on the wood, it means that the wood fibers can’t absorb the water since they are filled with moisture. This tells you that the wood is still wet and shouldn’t be painted yet.
How Long To Let Wood Dry Before Painting?
You should let the wood dry for at least a day before painting it. Generally, wood should be allowed to dry between a day and a few weeks before it is painted.
This is to allow enough time for the moisture in the wood to be fully evaporated. You should know that the time it takes for the wood to get dry enough to be painted depends on the type of wood, the moisture content in the wood, and the ambient temperature.
Softwood is generally known to dry faster than hardwood. Also, thin wood like plywood dries faster because the rate of evaporation in the wood is quick. Since the wood is thin, it’s easier for wood to air dry. Softwood and thin wood should be left to dry for 3 days so the wood can get dry enough to be painted.
The moisture content in the wood also matters. The higher the moisture content of the wood, the longer you’ll need to leave it to dry before painting the wood. Remember to let the moisture content drop below 15% before you paint over it. This can take several days depending on how much moisture is in the wood.
If the wood was power-washed, you should leave it for at least 3 days to get dry. This is because the wood will have a high moisture content.
The ambient temperature also matters. If the wood is placed outdoors, it will dry faster. This is because the wood will be exposed to heat and UV rays which will speed up the rate of evaporation and make the wood dry faster.
If the wood is indoors, then the ambient temperature will be low or cool meaning that the wood will take longer to dry. On average, indoor wood should be left for at least a week before painting over it. Exterior wood can get dry in as low as a day.
How To Dry Wood Faster?
There are a few ways to make wood dry faster.
1. You Can Use a Hairdryer
Hairdryers can generate heat up to 300 degrees Fahrenheit. At this rate, the wood will get dry very quickly. But be careful. Though the hairdryer will get the wood dry faster, it can also damage the wood if the heat is set too high.
To use a hairdryer, plug and turn on the hairdryer. Then set it to low or medium heat. After, move the hairdryer around the damp wood for a few minutes. Then turn off the hairdryer to let it cool down. Repeat this process until the wood is dry enough to paint it.
2. You Can Use an Electric Fan
Electric fans are powerful and they can make the wood dry faster. But electric fans are better for making thin and softwood dry faster. This is because the fan will produce air and it’s better suited to wood that air-dries like thin wood.
To use an electric fan, turn on the fan and make sure it’s facing the wood. Then leave it for as long as possible.
3. You Can Use Paper Towels
Paper towels can also help get wood dry quicker. To use this method, you’ll need to rub the surface of the wood with paper towels continuously. But, you should know that this method is much suited to small wooden pieces.
4. You Can Use a Microwave or Oven
This method should only be used for small wooden pieces like parts of picture frames, wall decor, and the likes. You should turn on and set the oven or microwave to low heat. Then leave the wood in the microwave for a few minutes. The heat produced by the oven will make the wood dry quicker.
5. You Can Expose the Wood to Sunlight
Nothing dries wood faster than sunlight. To use this method, you’ll need to dry the wood under direct sunlight for a few days. The heat from the sun will evaporate the moisture in the wood making it dry faster and easier to paint.
Now that you know how to get wood dry faster, what type of paint works best on wet wood? Let’s find out.
What Type Of Paint Works Best On Wet Wood?
The best type of paint to use on wet wood is a water-based paint. This is because water-based paint uses water as the paint’s solvent so the moisture in the wood will not repel the paint.
The moisture in the wood and the solvent in the paint will be very similar so the paint will perform well on the wet wood.
Never use oil-based paint on wet wood because the moisture in the wood will not be compatible with the oils in the paint. If you use oil-based paint on wet wood, the paint will not stick at all. All you will have is a wet sticky mess.
Related Read: How To Spray Paint Wood?
Can You Prime Wet Wood?
You can prime wet wood. It’s generally advised to prime wet wood before painting over the wood.
This is to make the paint stick better and perform well on the wood. You should only prime wet wood with a stain-blocking or waterproof paint primer.
These types of primers prevent moisture or water in the wood from bleeding through. Any other type of paint primer will be affected by the moisture in the wood. A perfect choice of paint primer to use on wet wood is shellac-based paint primer.
Can You Seal Wet Wood?
You can seal wet wood but only if you use a waterproof sealant on the wet wood. Waterproof sealants will not be affected by the moisture in the wood so they can be used on wet wood.
Also, it’s not advised to use a clear sealant like polyurethane on wet wood because these sealants reveal the texture of the wood underneath. Since the wood is wet, the damp texture of the wood will show through the clear sealant.
Overall, it’s possible to paint over wet wood but you need to get the wood as dry as possible before you can paint over it. You can do this by using a hairdryer, paper towels, or any other method.
Once the wood is dry enough to be painted, apply two coats of a waterproof paint primer and then apply the paint. This will ensure the paint dries and performs well on the wet wood.