Mold killing primer has the main effect of anti-alkali and anti-mold for walls.

For many people, mold killing primer is such as the “double-sided tape” that is extremely important to make the coat more beautiful, durable, and smoother. Especially for outside walls, the anti-mold primer is an indispensable product for every project in the harsh weather today.

If you are still wondering whether or not to use the anti-mold primer for your house, surely you will not be able to skip this article. Because I will give you all the vital information, you need most about the benefits and usage of mold killing primer for your dream house.

What Happens If You Paint Over Mold?

What Happens If You Paint Over MoldIn the process of painting houses, many people often skip the use of anti-mold paint to save money because they think that using primer is not necessary. So do paint manufacturers overestimate this type of indoor primer? Skipping primers when painting your walls does not lead to immediate consequences but will affect the quality of your work in the future.

As you have seen above, we have mentioned the effect of anti-alkali primer, so the harm of not using anti-sword primer is the opposite as follows:

It takes more paint. If you do not use primer, you will need to use more paint as the paint will be attracted to the plaster more. Meanwhile, the price of mold killing primer is high, but due to the extensive coverage, it is cheaper than coating. It can be said that the system using primer is always more economical than using ordinary color paint.

You should remember that coatings should not be used as a substitute for primers. Because this coating does not have the features of a primer such as waterproofing and anti-alkali so it can lead to paint flakes, peeling or uneven surfaces.

Your construction is susceptible to bacteria and mold attacks. You will notice that the walls of your house are degraded quickly due to the appearance of mold.

Moreover, you can realize that the inner structure of the wall will quickly be broken and the life expectancy of the wall will be greatly reduced. It will cost you a lot to repair and reinforce. Therefore, you must consider the suitable anti-mold primer to apply for your house.

How to Apply Mold Killing Primer?

The General Assessment of Construction Works

The General Assessment of Construction WorksPreliminary checking the construction quality to see if the builder has done well with plastering problems such as: is the wall surface smooth? Is the sand used for plastering meet technical requirements (fineness, fine grain, no many impurities)? If you find a construction fault, you should ask the landlord to have treatment plans to remove dirt and plastering protrusions, flattening the surface of the wall.

Check if the wall is soaked or not. Find and detect sources of water leakage and combine the use of specialized waterproofing materials.

Waterproof paint has many colors. Typically, for works without special requirements, use white primer, because white absorbs little heat, easy to create to paint color paints.

If you do not check carefully to fix the construction errors and make sure the wall surface is dry, the paint of your house may not be of the highest quality. No matter how good your paint is, the walls can still be peeling, bulging or mossy.

When painting an old house wall, the treatment of traces on the wall, color treatment of paint is an essential thing to paint better.

Dealing with variegated paint on the wall In case your walls use mortar, you have to scrape off and plaster all over. If the old paint is no longer adhering well, you need to completely discard the old color (you can use a wire brush). After that, you need to clean the surface and apply powder, anti-alkali primer, and finishing paint.

In case the old wall paint is still excellent adhesion, clean the surface to be painted, then apply one coat of primer and two coats of finishing paint.

To determine if the old paint is still good adhesion, you can check it by using duct tape on the wall and then peeling off. If the old paint is peeling off a lot, the adherence is no longer functional. If the old paint does not peel or peel off very little, it shows that the adhesion is still excellent.

If the old paint on your wall is of poor quality or too different from the new color, you should not apply new paint directly on the old paint. Instead, you must paint a layer of white paint first (when painting we can dilute the paint color). If the old paint color is almost the same as the new one, you can paint it directly on the surface as usual.

Paint Application Process

Paint application processPrepare the Surface

Rub the mortar on the surface of the wall to remove large particles of sand and make the surface smooth. Wash walls and moisturize appropriately to prepare the application because most of the baits are cement-based.

Note: When preparing the surface of the bait, it is not good, the paint adheres to the poor surface leading to blistering. Or untreated surface treatment also causes blistering.

Use Putty Powder

Add putty powder and water into a bucket and mix thoroughly. Apply that mixture to the wall and wait for the putty to dry. Then rub fine sandpaper to remove sand. Next, dusting the small holes, rough spots, and other imperfections on the walls with a brush to create a brighter and smoother surface.

You must pay attention to moisturizing putty during construction by coating a wet towel on the surface of the bucket.

So put a thin layer of putty to fill the wall surface with plaster. Take care not to use too much putty as this may cause the paint to peel off.

Apply Suitable Primer for Your House

When the wall is dry, clean the wall again before using the primer. Stir it well before use, cover the wall with a coat of primer. Make sure the primer covers the entire wall surface and has just the right thickness to prevent the wall from getting soaked. Besides, the alkali resistance feature of the primer prevents the coating from fading. The white color of the primer also helps to show the color of the surface more accurately and beautifully.

The effect of the coating gives the wall the smooth, glossy, and beautiful look you expect.

Hopefully, with this article, you have realized the critical uses of primer when painting a house. Using primer generally helps the paint stick more, to color better and more durable. So when decorating your home, you should not ignore this primer. Besides, remember to choose suitable paints, from reputable brands in the market to ensure the quality of the project.

More: Best Primer Spray Guns

The Cause of Mold

The cause of moldThe poor quality of construction materials or faulty waterproof construction can make your wall moldy. Besides, improper coating primers are also a significant cause of decay.

Many people believe that if the walls are mossy or streaked, the main reason is actually due to the selection of inappropriate paint. If the paint is not suitable for the climatic characteristics at the location of the house, you will find it hard to have good paint cover.

Due to the porous nature of the cement slurry, the natural water absorption is high. And following the principle of “oil lamp wicks,” the mortar absorbs water and spreads it upward until it cannot be drained up. Usually, they moisten the foot of the wall about 50 centimeters to 1 meter from the base of the moist substrate, and the older this plaster, the stronger the permeability.

If you do not evaluate the importance of waterproofing properly, you may skip waterproofing measures. And it will be the most important cause of mold appearing in your house.

Where Is Mold Most Commonly Found in Your House?

Where Is Mold Most Commonly Found in Your House

  • The Walls Adjacent to Another Newly Built House: If the wall of your home is close to the wall next to it, and that wall has not plastered, then water can seep from it to your wall and cause moisture and mold.
  • The Location Where Near Your Toilets: If your walls are moldy at the restroom location, you should use a liquid waterproofing admixture and a waterproofing membrane to cover the inside and outside surfaces of the dank walls.
  • Ceiling or Decorated Place: If the wall is damp and moldy in the position you need to paint, you should use materials that have both decorative and cover features. You can also use bricks to cover the surface of the wall or use wood to cover the surface of the wall to look beautiful and avoid mold.

Does Primer Kill Mold?

Does primer kill moldMold killing primers are an essential product in the home painting process. Primer is an indispensable layer of paint if you want to protect the wall in the best way.

Main Components in Anti-mold Primer Include:

  • Refined Color: including two types. The main effect of this type of ingredient is to create the color of paint, prevent moss, and prevent erosion and smudges in the wall.
  • Linking Agent: is a substance made from resin that helps connect the first colorants in the paint. Besides, it also helps spread the color evenly.
  • Solvent: This is a layer of solution that allows mixing components to make it easier to apply. The solvent is usually water (water-based paint), oil-based paint, or oil – aromatic gasoline.
  • Additives: An indispensable component of the anti-mold primer is additives. Additives include substances such as slime, anti-splash paint, antimicrobial agents, and anti-foam agents.

It Brings Tremendous Effects as Below:

  • A two-sided adhesive layer, glued with putty and coat together into a single layer
  • Primer gives the wall the best adhesion to keep the paint firmly on one layer of plaster
  • Creating a gloss to help the coating more complete, waterproofing, anti-mold for walls
  • Alkali resistance helps neutralize the powder layer can harm the surface paint afterward
  • Help protect the plaster layer from the effects of rain, weather and even prevent cracking of the plaster coat thanks to the great glue of the primer
  • Help save the amount of color paint because the primed wall is not covered with plaster or dry cement
  • Improve the waterproofing of the building

Currently, on the market, almost all types of primers are manufactured for both interior and exterior. It helps improve the life of the paint surface, as well as hiding uneven color spots and protecting the new paint, increasing the adhesion.

Besides, primers also help prevent internal waterproofing and moldy moisture. They are suitable for painting in bathrooms, kitchens where are the lowest humidity. In general, the use of primer is essential, whether it is a new or an old wall. Because it does not only contribute to protecting the wall surface but also enhances the aesthetics of the building.

From the above advantages, everyone must know what the effect of mold-resistant primer is. Therefore, do not overlook this primer. It is an essential step if you want to protect your house most comprehensively.


Mold killing primer is helpful for your painting of house?

Well, read all that we share above, please; and then, your house will look cleaner and fresher after applying mold killing primer.

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