How To Paint Latex Over Oil-Based Primer [And Tips For Homeowners]?

Most paints, including latex paint, are compatible with oil-based primers. Despite their compatibility, they will not work well together without adequate preparation. Want to know how to paint latex over oil-based primer and some tips for doing it? We have conducted in-depth research on this subject and have produced guidelines for you.

The steps of painting latex over oil-based primer include the following:

  1. Prepare the tools and materials needed.
  2. Wear appropriate personal protective equipment (PPE).
  3. Set up the workspace.
  4. Sand any previous gloss paint.
  5. Remove any loose old paint.
  6. Seal holes or cracks and sand them.
  7. Perform a thorough cleaning.
  8. Apply oil-based primer.
  9. Sand the primer coat.
  10. Apply latex paint.
  11. Allow the paint to completely dry.

To successfully finish the job, below are some tips to follow:

  • Sand cabinetry by hand.
  • Use tack cloth gently.
  • Ensure adequate ventilation and wear PPE before applying TSP.
  • Allow the oil-based primer to dry before painting.
  • Avoid overloading the brush with paint when painting.
  • Apply two coats of latex paint.

We'll have a fascinating conversation about latex paint and oil-based primers in this post. We'll also go into further detail about the procedures and advice for painting with them. Continue reading because there is more to learn.

painting roller- applying latex over oil-based primer - How To Paint Latex Over Oil-Based Primer [& Tips For Homeowners]

How To Paint Latex Over Oil-Based Primer [& Tips For Homeowners]?

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Renovation of the apartment. Painting a white wall in bright green. Rolling paint.

With the right preparation, you can paint over an oil-based primer with latex. The two paints' various drying durations result in the paint's differing rates of expansion and contraction, which is problematic. The paint will completely peel off the surface in a few weeks if you don't follow procedures. Adhere strictly to the directions below.

1. Prepare The Tools And Materials Needed

You'll need the following things to complete this project:

  • Oil-based primer
  • Latex paint
  • Plaster tape
  • Drop cloths
  • Sandpaper 
  • Sander or sanding machine (optional)
  • Putty knife
  • Tack cloths
  • Paintbrushes
  • Paint roller
  • Extension pole for paint roller 
  • Paint sprayer
  • Paint tray

2. Wear Appropriate PPE

To keep yourself safe while cleaning or before beginning any prep work, you need the proper PPE. Wear gloves at all times to safeguard your hands.

Click here to see these gloves on Amazon.

Wear safety glasses, face shields, or safety goggles when working with paint or paint thinners. It is especially important while sanding, using spray paint, or painting higher than your head.

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Put on a mask to provide your lungs additional protection, especially if you are sensitive to chemicals, and to shield you from the dust created by sanding.

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3. Set Up The Workspace

It is important to prepare your working station in every painting endeavor. Cover any surfaces or objects that might be at risk from excessive spatter with a drop cloth or thin plastic sheet. Additionally, make sure there is sufficient ventilation and decent airflow in the space where you are working.

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4. Sand Any Previous Gloss Paint

Remove all of the previous oil-based paint from the surface using fine-grit sandpaper. The paint will adhere better as a result of this. 

Click here to see these assorted grit sandpaper on Amazon.

It is crucial to make sure that all shine or gloss has been eliminated because a smooth finish can hinder a finish coat's ability to adhere just as effectively as dirt can. Remove any loose paint fragments from the surface with a putty knife or other similar tool. 

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5. Remove Any Loose Old Paint

Using a putty knife or painter’s tool, pry off any loose paint from the walls. Simply scrape off the deteriorating paint. Solid paint may remain.

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6. Seal Holes Or Cracks And Sand Them

Check the walls you intend to paint to see if there are any seams, gaps, or cracks that require sealing. Use wood putty or wood filler to patch them. Allow the filler to completely dry before using fine-grit sandpaper to softly sand the filled areas.

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Use a tack cloth to gently wipe down the surface to remove any remaining dust, dirt, or sandpaper granules once the surface has dried fully.

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7. Perform A Thorough Cleaning

Use trisodium phosphate (TSP) to perform a thorough cleaning before priming if the surface is excessively greasy and filthy even after using a tack cloth.

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Combine 1/4 to 1/2 cup of TSP with one gallon of hot water, particularly for grimy surfaces. To clean the surfaces, use a sponge that has been dampened with the TSP solution. To lessen streaks, wash surfaces from the bottom up.

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After using TSP to clean the surface, sponge it with fresh water to rinse unless you have chosen a no-rinse TSP formula. Allow the surface to completely dry by air.

8. Apply Oil-Based Primer

You can now prime the surface once it is entirely dry and free of dirt. Apply the primer exactly as directed on the bottle. This is crucial because it creates a porous surface for the latex paint to adhere to. 

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Apply the primer with a brush. Preferably apply two coats. Then, let it dry completely. Apply a light application for the first coat and wait until it is dry before another coat.

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9. Sand The Primer Coat

In order to make the primer even with the surface, you must sand it. Remove lumps, irregularities, and uneven wood surfaces by sanding with 100-grit sandpaper. As a result, the primer and latex will bind nicely.

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10. Apply Latex Paint

Then, using your preferred latex topcoat, apply a single coat of high-quality latex paint with a roller, brush, or airless sprayer. Don't be stingy with the number of coats you apply—the more layers, the better! Between applications, allow the paint to cure for at least two hours.

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11. Allow The Paint To Completely Dry

In two to three days after the last coat is applied, the painted surface will be dry enough to touch. But before putting any heavy items of yours to the surface, you must wait for the paint to fully cure, which could take up to a month.

What Are The Tips For Homeowners On Placing Latex Over Oil-Based Primer?

Paint brush, close up hand painter worker painting on surface wall Painting apartment, renovating with yellow color paint. Leave empty to write descriptive text beside.

Latex paint is long-lasting, easy to use, and works well over oil-based primer. Nevertheless, there are a few tips to keep in mind, so let's go over them in the list below:

Sand Cabinetry By Hands

You might opt to use sand manually or by hand rather than a power sander when scuffing up cabinetry or trimming with detailing. The surfaces can be under too much strain from a power sander.

Use Tack Cloth Gently

Tack cloth is a cheap, straightforward fabric created from cheesecloth that has been treated with a sticky material, like beeswax. The errant dust particles are captured by their sticky surface. Apply lightly. Hard pressure will produce a waxy surface that will require additional sanding to remove.

Ensure Adequate Ventilation And Wear PPE Before Applying TSP

TSP is a mild but efficient cleaning agent used to clean and prepare surfaces for painting. Additionally, it de-glosses. Before using TSP, make sure you have enough ventilation, skin protection, and eye protection. Phosphates are prohibited in some communities. If this is the case, use a product phosphate-free TSP substitute.

Click here to see this phosphate-free TSP substitute on Amazon.

Allow The Oil-Based Primer To Dry Before Painting

Everything, including latex paint, does not combine well with oil. If you don't allow it to dry totally, the paint and primer will mix and end up looking dull. 

Additionally, if you don't wait for it to dry, it won't be as strong as it could be. It is significant to note that the drying time for oil-based primers might reach eight hours

Avoid Overloading The Brush With Paint When Painting

You should simply dip the brush's tip in the paint for the greatest painting technique. Avoid drenching the entire brush. Always keep the edge of the paint wet while you draw with slow, steady strokes.

Apply Two Coats Of Latex Paint

As a general rule, it is recommended to paint over your primer with two layers of latex paint and give each layer between two and four hours to dry.

Is Primer Necessary Before Painting?

the roller is wetted in a liquid primer in a plastic black container, before painting the walls with paint

You can choose to prime the surface first even if some prerequisites are not met. If any of the following circumstances arise during your painting endeavor, you might choose to apply paint priming.

  • A highly porous surface such as newly installed, bare wood, retaining wall blocks, and bricks.
  • Skim-coated drywall. This requires at least one coat of primer before painting.
  • Having a glossy base/previous coats. Using a primer will make subsequent coats adhere even if you decide not to scuff that glossy shine.
  • If you're changing the color from dark to light, you can apply less primer and color coats because doing so will make the primer's color more similar to the color of the wall finish.
  • For spotted or stained surfaces, just apply one or two coats of primer.


painting roller- applying latex over oil-based primer

The most crucial factor to take into account before starting a project is the compatibility of paint and primer. If your items are incompatible, the primer won't be effective and your painting project will eventually fail.

If you found this article helpful, check out these other interesting painting posts:

How Long After Painting To Remove Tape [And How To Remove It]

How To Get A Smooth Finish When Painting Kitchen Cabinets


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