When Do You Need to Use a Wall Primer

When Do You Need to Use a Wall Primer?

Feb 01, 2023Richard Weager

Is it necessary to use a wall primer? Painting is an excellent way to add style and colour to any room in your home, but it must be done correctly. That’s why using wall primers can be so beneficial when starting a new painting project. Wall primers are specially formulated base coats that provide better adhesion of the topcoat paint, improved hiding power (coverage) and an even finish over large areas like walls or ceilings. But do you really need to use wall primers before beginning your next painting project? In this article we will discuss what exactly wall primer is, when it should be used, as well as how best to apply it for optimal results!

What is Wall Primer?

Wall primer is a type of base coat that is used to prepare walls for painting. As well as helping to create a uniform surface, it helps to improve adhesion and prevent stains from bleeding through the topcoat. Primer also serves as an extra layer of protection against dirt and moisture.

Definition of Wall Primer: Wall primer is a special type of base coat designed specifically for prepping walls before painting them with regular emulsion paints. It often has a thicker consistency than regular paint and usually comes in white or grey colours. The purpose of wall primer is to provide an even base coat that will help the topcoat adhere better and last longer.

Benefits of Using Wall Primer: Applying wall primer prior to painting can be beneficial in several ways. In addition, it ensures that the surface of the wall is as even as possible by filling in any cracks or imperfections. Secondly, it helps prevent stains from bleeding through the topcoat by creating a barrier between them and the new paint job you’re applying to the overtop. Finally, using wall primer provides additional protection against dirt and moisture which can extend the lifespan of your painted surfaces significantly if done properly.

There are three main types of primers available each with their own unique benefits depending on what kind of project you’re working on.:

Water-Based Primers: are generally easier to work with because they dry quickly but may not be as durable as oil-based ones when exposed to extreme temperatures or high humidity levels.

Oil-Based Primers: tend to have better stain blocking capabilities but require more time for drying since they take longer to cure completely.

Shellac Primers: Shellac has long been used to seal wood and other surfaces. Shellac-based primers, which are excellent for interior paint projects and work well on severe water and smoke damage to walls and surfaces, may be the best stain-blocking primers. They even effectively seal in odours caused by smoke damage.

Wall primer is an essential step in the painting process, providing a better surface for paint adhesion and helping to ensure a longer-lasting finish. Now that you know what wall primer is, let’s explore when it should be used.

When Should You Use a Wall Primer?

When preparing a surface for painting, wall primer can be beneficial. Primer helps to ensure that the paint adheres properly and lasts longer. It also provides an even base coat for the paint to adhere to, which can help reduce the amount of coats needed and make it easier to achieve a uniform finish. When painting over previously painted surfaces, priming helps create a good bond between the old and new layers of paint. If you are painting new drywall or plasterboard, using a wall primer will help seal any gaps or imperfections in the surface before applying your topcoat of paint.

Preparing the Surface for Painting: Before applying any type of wall primer, it is important that you prepare your walls correctly by cleaning them with soap and water, sugar soap solution, or mild detergent if necessary. This will remove any dirt or grease from the walls so that they are ready for priming. Once cleaned, lightly sand down any uneven areas on your walls with fine-grit sandpaper until smooth before wiping away all dust particles with a damp cloth prior to priming.

If you’re planning on repainting over existing surfaces such as wallpaper or gloss paints, then it’s important that you use an appropriate wall primer first in order to get good results from your finished project. Wallpaper needs special preparation including stripping off old paper and sealing seams before applying two coats of primer followed by two coats of emulsion topcoat. Glossy surfaces need de-glossing with fine-grit sandpaper prior to application of one coat primer followed by two coats latex based topcoat.

When working with new drywall or plasterboard, it is best practice to apply at least one coat of wall primer before adding multiple layers of finishing paint. This will help provide an even base layer onto which subsequent layers can be applied more easily without leaving visible brush strokes behind when complete. Additionally, many primers contain additives designed specifically for filling small holes left behind after installation, making them the ideal choice when covering up these types of minor imperfections found on newly installed boards. Most primers also have added benefits such as mildew resistance which can extend the life expectancy once the completed job has been done correctly.

Using wall primer is an important step in any painting project, as it helps to ensure that the paint will adhere properly and last longer. In the next section, we’ll discuss how to apply wall primer for optimal results.

How to Apply Wall Primer?

Preparing the Room and Surface for Application: Before applying wall primer, it is important to prepare the room and surface. This includes clearing away any furniture or other items that may be in the way of painting, covering up any surfaces you don’t want to get paint on with drop cloths or plastic sheeting, and taping off areas such as windowsills or door frames. Once these steps are complete, make sure to clean the walls thoroughly with a damp cloth before beginning.

Applying the Primer with a Brush or Roller: After preparing your space for application, you can begin priming your walls. Start by pouring some primer into a tray and using either a brush or roller to apply it onto your walls in even strokes from top to bottom. Make sure not to overload your brush/roller as this can cause drips and uneven coverage. Continue until all of your desired area has been covered completely then allow time for drying before moving on to painting overtop if necessary.

When finished applying wall primer, take care of any finishing touches needed such as sanding down rough spots or touching up edges where two colours meet (if applicable). Finally, clean up all supplies used including brushes/rollers being careful not to leave excess paint behind which could lead to stains later on. With these steps completed you should now have perfectly primed walls ready for whatever project lies ahead.


In conclusion, wall primer is an important part of the painting process and can help ensure that your walls look their best. It helps to create a smooth surface for paint to adhere to and can even out any imperfections in the wall. So if you’re looking for a professional finish, then do you need to use wall primer? The answer is yes! With proper application, it will make all the difference in achieving beautiful results.

It’s time to make a change for the better and protect our environment! With Greenshop Paints, you can take part in making sure your home is painted with environmentally friendly products. Wall primer provides an important base layer that helps paints adhere to surfaces and last longer – so when it comes time to paint or refinish your walls, don’t forget about wall primers! Investing in quality wall primers now will save you money later by preventing peeling or fading of your paint job. So why wait? Take action today with Greenshop Paints for a sustainable future.

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