Can you put oil primer over latex paint

I’m repainting my house, but I’m not sure what kind of paint was originally used. Is it okay to put latex paint over oil-based, or is it the other way around? -Howard

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Further Information
What is the best primer to use over latex paint?
Can you put oil based primer over water
Can you put oil based Kilz over latex paint?

In order for your new paint to form a good bond with the existing paint, it’s important that the two paints are compatible. Don’t apply oil-based paint over latex; but you can put latex paint over oil-based, as long as you prepare the surface properly first.

Start by finding out if the existing paint is oil or latex by rubbing the surface with denatured alcohol on a rag. If some of the paint comes off on the rag, it’s latex. If not, the existing paint is oil-based.

To apply latex paint over oil-based:

Lightly sand the surface with fine sandpaper (180 to 220 grit) to remove the gloss.
Clean the surface with a sponge dipped in a solution of TSP (trisodium phosphate) mixed with water.
Remove the cleaner with a sponge and clean water, then allow the surface to dry.
Apply a coat of a quality bonding primer (oil-based or latex), and allow the primer to dry.
Topcoat with two coats of high quality latex paint.

Watch this video to find out more.

Further Information

Applying Latex Paint Over Oil-Based Paint (video)
Homeowner’s Guide to Paint Primer (article)
When to Prime Before You Paint (article)

VIDEO TRANSCRIPT

Howard asks: I’m repainting my house, but I’m not sure what kind of paint was originally used. Can I use latex over oil, or should it be the other way around?

Danny Lipford: Now, that’s a great question. But before we answer the question, we have to determine exactly what kind of paint you have on your woodwork right now. Here’s an easy way to determine that. First of all, take some denatured alcohol, put it on a rag, wipe the woodwork, and if any paint comes off on the rag, then you have latex paint.

Now, you never want to paint oil over latex. It just won’t stick. But you can paint latex over oil-based paint, if you prepare the surface properly. First of all, take a little bit of sandpaper and just lightly sand it. Then you want to use some trisodium phosphate, or TSP, you can find it in any paint store or home center. Then, after that dries, use a good bonding primer. Put one coat of primer on it. After that dries, you’re ready to finish up the paint job, and you’ll know that it’ll last.

One of the most common mistakes in painting is applying oil over latex paints. Although, despite this simple rule, it can raise other concerning factors: can you use a waterborne alkyd over latex paint and vice versa? And if so, does it require a primer? Today we will discuss these concerns as well as give a quick tutorial on how the process should be executed. If you have any questions about this blog or any other paint related inquiries, please contact your local Houston Interior Painting?experts, Pro Painters, for additional information.

Sometimes it can be difficult to determine if it?s safe to apply oil paint over latex paint, but we assure you, overtime it will ruin your surface. Due to the flexible qualities of latex paint and the brittle characteristics of aged oil paint, it can eventually split and crack the painted surface. Another concern is whether or not it?s safe to apply waterborne alkyds over latex. Waterborne alkyds are a low-VOC paint that provide a clean durable finish and are mainly used for wooden cabinetry. They are available in odor-free options and can safely be applied over latex paints. Although, perhaps one of the best features about alkyds aside from providing protection to your surface, is that you rarely have to apply a primer on top.

If you plan on using waterborne alkyd paint over latex paint we first suggest that you thoroughly clean the surface you will be working with. This is a key factor. The surface must be free of all dust and grime as well as any wax, oil, grease, or mildew. In addition, try your best not to have any soap or water soluble materials left over from the cleaning. You want it to be bone dry. If there are any peeling flakes or blemishes in the surface, you?re going to need to properly sand off these areas so everything is clean, crisp, and uniform. Next, begin applying your alkyd paint. It is best to use a nylon/polyester brush or roller. Also, you should consider setting up additional ventilation in your work area to ensure that the paint dries rapidly.

Painting can be fun and easy, but it is always good to thoroughly research the materials you will be working with. In addition to understanding the safety information, it will help you prevent any possible future damages to your surface. And remember, never apply oil paints over latex unless you are using a waterborne alkyd which will safely coat the more flexible layer beneath. Although, to fully ensure the job is done right, we highly recommend you utilize the expertise of a Commercial Painting Contractor.

Eddie founded Pro Painters in 1995 to meet the growing need for high-quality residential and commercial painting needs in Houston. In nearly 20 years, Pro Painters has exponentially grown our client base, serving residents across the greater Houston area. Our core principles have helped us achieve the highest standard of workmanship and customer satisfaction. Our years of experience have allowed us to become an extension to our customers as the all-in-one solution for home makeovers.

What is the best primer to use over latex paint?

Shellac Primer They also are excellent at preventing normal water, rust and smoke stains, as well as wood tannins from bleeding through new paint. They work well on wood, metal, plaster, and even plastic, and are fast drying and highly adhesive. They also can be used with both oil-based and latex paints.

Will oil

As previously mentioned, latex is flexible in nature. As a result, oil-based paint won't properly adhere to latex unless you sand the surface and add primer between each of the layers. Start by equipping yourself with a piece of P80 grit sandpaper and try to remove as much of the latex from the surface.