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How Long Should Primer Dry Before Painting?

Updated
Primer is more than just white paint. It seals, adheres, and gives you a smooth surface.

How long does it take for primer to dry? Primer dries within 30 minutes to an hour, but that doesn’t mean you can start painting right away. Two or three hours is how long the primer should dry before painting.

In this article, we examine how long it takes primer to dry so that you get the best results and a long-lasting painted surface.

Factors Influencing Primer Dry Time

There are many reasons why primer drying times differ. It changes by brand and type. There are 4 types of primer: latex, oil-based, shellac, and self-priming paint. Also, the type of weather conditions and surfaces make a difference. There are ways you can speed up the drying times, like increasing the ventilation and reducing humidity.


What Is a Primer and When You Might Need To Use It?

A primer is a base coat that goes directly onto the surface and helps to improve the spread, appearance, and adherence of the first coat of paint. It also protects the surface beneath and extends the life of the paint.

You don’t always need to use a primer, especially if your walls and surfaces are in good condition or you are touching up existing paintwork; however, there are situations when using a primer is a must.

The Surface Is Uneven

If you are trying to paint on uneven surfaces, applying primer helps smooth the overall appearance and makes the paint stick better. If you want to paint bricks, wood, or new drywall, they are very porous, so the primer creates a seal to stop your paint from being absorbed into the surface, which costs you more and takes longer for the paint to dry.

Painting a Dark Wall

When you are changing the color, going from light to dark is not a problem, but painting over a darker color with a lighter one is trickier to get right. Primer is a great way of neutralizing the effects of the dark color, giving you a lighter surface to put your paint on.

Primer is cheaper than paint, so it saves you money, and it speeds up the process.

The Wall Has a Glossy Base

If your surface is glossy, paint won’t adhere as well, so use a primer to lay down a matte coat for the paint to stick. Primer has a different make-up to paint and contains more sealing qualities than color.

New Drywall

New drywall is porous, so the paint just soaks in, meaning you need several coats at great expense. Primer seals the surface, making it easier to apply the paint. It increases the coverage and stops the paint from absorbing into the surface.

Smoke or Water Damage

If you have any staining on your walls, it still shows through every time you paint over it. That’s because paint has more color pigments and fewer sealing qualities. Primer is the opposite. It locks in the stain, making it possible to paint over it without it coming through.

Shellac is the best type of primer to use if you have stained walls.

Wood

Wood is porous, so no matter how many coats you lay down, it keeps soaking in. Primer is a cost-effective way of sealing the surface, stopping the paint from absorbing.

Factors That Impact the Primer Drying Times

Primer takes between 1 and 3 hours to dry on average, but significant factors alter the way the primer dries.

Type of Paint Primer

Essentially, there are 4 types of primer: oil-based, water-based, shellac, and self-priming. Let’s take a look in more detail.

Water-Based

Water-based primer has water as the main ingredient. They are low VOC (volatile organic compounds), low odor, and better for the environment. They are also easier to clean after you have finished the task. Plus, drying times are a lot faster.

Oil-Based

Oil-based primers are the best choice for porous surfaces and bare wood because they seal and create a better foundation for the paint to stick to, but they take up to 4 hours to dry.

Shellac

Shellac is ideal for smoke and water-damaged walls. Shellac is also versatile, working well on wood, metal, plastic, and plaster.

Self-Priming

Self-priming paint is a primer and paint in one. It saves you money and time because you don’t need to prime the surface first. It also saves you time because you simply apply the paint, and it does the rest.

Most self-priming paints are dry to the touch in 60 minutes, so you can get on applying the second coat.

Brand Used

Drying times vary massively between the brands and types of primers. As we’ve discussed, water-based products dry the fastest, with oil-based primers taking up to 4 hours.

Humidity and Temperature

The amount of moisture in the air slows the way the primer dries. Most manufacturers recommend applying the paint in temperatures between 40 and 80 degrees Fahrenheit, with a maximum humidity of 85 percent.

If the weather is too hot, the primer will take longer to dry, and if it’s too cold, it thickens the formula, especially oil-based products, making it impossible to brush it on. Some water-based paints may freeze in extreme temperatures because the primary ingredient is water.

Ventilation

Keeping your indoor spaces ventilated when applying shellac or oil-based primers is important because they contain chemicals that release strong odors that could become overpowering. It could even induce nausea, headaches, and sore eyes and throat.

A good flow of air keeps the air circulating, which enables the primer to dry.

Type of Surface

Priming metal takes longer, up to 4 hours, while wood and brick are porous, absorbing more of the primer. Because of this, you may need additional coats to get proper adherence.

Coating Thickness

The thicker you apply the primer, the longer it will take to dry. It’s always best to read the manufacturer’s guidelines and try not to use too much.

Exterior or Interior Project

If you are painting outside, you need to keep an eye on the weather forecast and try to avoid priming in the mid-day sun when it’s at its hottest. You might be better waiting until the evening to paint on the primer, or failing that, get up early before the sun has gained strength.

Painting inside is a bit easier because you can control the temperature and humidity by setting your thermostat and using a dehumidifier.

Drying Times of 25 Popular Primers

As we’ve touched on, the brand of primer you have differs from other products when it comes to drying times. Let’s take a look.

Product Type Drying Time
Kilz 2 All-Purpose Latex 60 minutes
Valspar Latex 60 minutes
Zinsser Bull’s Eye Latex 60 minutes
Kilz Mold and Mildew Latex 30-60 minutes
Zinsser Rust-Oleum Latex 60 minutes
Kilz Original Oil-Based 30-60 minutes
Zinsser Cover Stain Oil-Based 30-60 minutes
Rust-Oleum Metal Oil-Based 2-4 hours
Zinsser Odorless Oil-Based 30-60 minutes
Valspar Anti-Rust Oil-Based 2-4 hours
Zinsser B-I-N Shellac 25-60 minutes
Zinsser Clear B-I-N Shellac 25-60 minutes
Zinsser Bull’s Eye Shellac 30-60 minutes
Behr Ultra Self-Priming Paint 1-2 hours
Behr Marquee Self-Priming Paint 1-2 hours
Behr Premium Plus Self-Priming Paint 1-2 hours
Valspar Self-Priming Paint 30-60 minutes
HGTV Home Self-Priming Paint 30-60 minutes
HGTV Home Showcase Self-Priming Paint 60 minutes
Zinsser Self-Priming Paint 30-60 minutes
Kilz 2 All-Purpose Latex 60 minutes
Valspar Latex 60 minutes
Zinsser Bull’s Eye Latex 60 minutes
Kilz Mold and Mildew Latex 30-60 minutes

How To Know When Primer Is Dry

The general rule of thumb is you should keep checking the primer. If it feels dry to the touch, it is probably ready for the first coat of paint. Most water-based primers take 60 minutes to dry, while oil-based products could take as long as 4 hours.

If you want to be 100 percent sure, check the maker’s guidelines.

How To Make Primer Dry Faster

The best way is to use the primer exactly as the manufacturer recommends. Make sure you follow all of the instructions and don’t be tempted to skip anything. However, if you want to speed up the process, there are some things you can do.

Keep Humidity Down

By reducing the amount of moisture in the air, you ensure that the primer dries faster. You can use a dehumidifier to reduce humidity or wait until you have a cooler, less humid day.

Use Fast-Drying Primer

If speed matters, use self-priming paint. You get the color down, and as it dries, it seals just like a primer. It also removes the need to lay down a coat of primer and wait until it dries.

If you still want a separate primer, water-based products are much faster at drying than oil-based formulas.

Use a Hairdryer

Hold the hairdryer about a foot away from the primed surface and keep it on low heat.

Thinner Coats

Thinner layers will dry faster than a thick coating. It might mean you have to paint two layers or more, but the drying times between each coat are a lot faster.

Increase Air Circulation

Allowing a free flow of air inside your room helps to air dry the primer. Think of it like drying washing on the line. Without airflow, it would take a lot longer.

What Happens If You Paint Over Primer Too Soon?

If the primer is still wet, it will mix with the paint, altering the color, plus you will get an uneven surface with reduced paint adherence. If the primer is too wet, it might lift off the wall and leave streaks or flakes as the wall dries.

FAQs

How Long To Let Primer Dry Before Painting Miniatures?

You should wait a minimum of 15 to 30 minutes before you start on the first coat of paint.

How Long Should Primer Dry Before Painting Metal?

If you are using a spray primer, you should wait 10 to 30 minutes between coats for it to dry. If you are using an oil-based product, it could be as long as 4 hours. Water-based primer takes about an hour to dry.

How Long To Let Primer Dry Before Spray Painting?

You should allow 10 to 30 minutes between coats if you want to spray paint. Spray primer goes on thin and dries faster than other primers, but remember to add a minimum of two coats.

How Long Should Primer Dry Before Painting a Car?

Most experts agree that waiting a minimum of 24 hours before applying your first coat of enamel-based paint or base coast is the accepted time frame. Between each coat of primer, you should wet sand the surface using 1,000 to 1,200 grit sandpaper.

How Many Coats of Primer Are Appropriate?

You should apply a minimum of two coats for bare wood, masonry, concrete, and drywall. This also applies to painting dark surfaces.

How Long To Let Primer Dry Before Sanding Wood?

For some primers, you should leave 2 to 3 hours for them to dry. However, if you can leave it longer, 12 to 24 hours is the ideal drying time.

How Long Can I Wait to Paint After Priming?

The best advice is to wait between 12 and 24 hours for the very best results. However, most water-based products allow you to paint after an hour and 3 to 4 hours for oil-based primer.


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About the Author

Mark Weir

Mark spent 24 years working in real estate, so he knows his way around a home. He also worked with contractors and experts, advising them on issues of planning, investments, and renovations. Mark is no stranger to hands-on experience, having renovated his own home and many properties for resale. He likes nothing better than seeing a project through to completion.