Best Primer For Plaster – a Perfect Protector of Your House


The best primer for plaster in this review provides you everything you may require from a primer. Firstly, here is a brief information about what the primer does.

Primer is an important step in all painting projects, although sometimes neglected. Primer is essentially a layer of material, covering stains or discolored points on surfaces. It also works well in hole-sealing and provides a consistent adhesive base for paint.

Best Primer For Plaster - A perfect protector of your house
Image by Jim Stephenson

If you skip the primer, you will likely need more coats for sufficient coverage. However, the results may not be satisfactory as the result may turn out patchy, and the paint may not stick as well to the original surface.

Nowadays, the market offers an array of primers, and the question is how to choose the best one. 

Buying Guide

Here are some tips for your primer choice. Read on, and you will see what you seek

Choose the color you like

The white is regular in all situations.

If the finish paint does not require a special effect, a white primer is always a versatile choice. A white base will ensure that the paint color shows up uneffected.

Remember that primers will not create a colorful finish. It mainly plays roles in stain-covering, moisture-blocking, and hole-sealing on the original surface. After the primer, you will be able to unleash your creativity in painting your plaster with more colors.

Add some colors to satisfy your creativity.

In case the new paint color is much lighter than the current one on the surface, you may pick a colored primer. Or you can mix your white primer with a small amount of pigment by yourself to create a blend that is closer to your desired outcome.

What you use depends on where you put your project on

Ads often tell you that their primers work well on all surfaces. However, sometimes it does not work as well as the manufacturer claims. 

To have satisfactory results, you should take some time to seek. There are different formulations of primer intended for various surfaces. Let’s find out what makes the difference.

Best Primer For Plaster - A perfect protector of your house
Image by Laure Joliet

A saving option for interior plaster

It can apply paint-and-primer-in-one on a new plaster wall. This product, as its name implies, saves you a lot of time and effort. You only need to do a few coats of paint to get a final surface that is smooth and beautiful in color.

However, it is needed to clean the plaster before applying paint-and-primer-in-one on it. You must ensure that there are no stains or cracks on the original surface. A paint-and-primer product may not perform as effective as a real primer in many situations. 

This product is also not recommended for exterior walls due to not satisfying the high-performance bond, stain-blocking, or sealing properties of real primers.

A solution for challenging surfaces

An oil-based primer is an expert for dealing with metal or woodwork. This primer is the ideal preparation for enamel paints, for being hard enough to protect surfaces that are likely to be touched, such as doors, windows, and cabinets. 

These surfaces require heavy traffic and exposure to the elements, so they are usually painted in enamel. Besides, if you are planning to refresh the moldy surface of old plaster walls or old-fashioned furniture, an oil-based primer is a must-buy product. 

They perform amazingly when covering the most challenging surfaces, including crayons, bleeding brown stains, and oil-based adhesives. 

They effectively fill holes or cracks. Besides, oil-based primers contain minerals that make them excellent in creating a smooth and flat surface. The perfect primers will help your painting work quickly with satisfactory results.

A worthy investment for exterior walls

Water-based primer, also known as “latex” based primer, is recommended for use on walls or ceilings. These are large areas, requiring you to complete these projects with a quick-drying primer

Modern water-based primers usually evaporate very rapidly, often faster than the similar process of oil-based primers. In some cases, it can apply finish paints within an hour after the primer.

Unlike oil-based primers, water-based primers do not work very well on most challenging surfaces. It will fulfill its role on new surfaces and objects, and preparation is required.

However, this weakness contributes to another upside of water-based primer. Removing water-based primers is effortless with warm, soapy water. To do the same with oil-based primers, you need more effort with the help of strong cleaning solvents.

Top Five Best Primer For Plaster

Many people believe that using primers wastes time and money. That is a common misconception. Although painting without a primer may give the desired finish, the surface will soon deteriorate over time.

Do not skimp. The initial investment will save you a lot of money in the long run. The top five best primers for plaster below will provide you with worthwhile investments. 

KILZ Premium High-Hide Stain Blocking – Best For Porous Filling

KILZ is a familiar name to those who are passionate about beautifying their house. You can find many options from this US brand on the Internet. Here, we recommend one of the best picks for both interior and exterior use.

This Latex Primer has a perfect stain-hide ability. It helps to achieve a uniform surface in white. Then the color of the finish paint will perform true. It also provides high adhesion to most surfaces, including woodwork, drywall, masonry, paneling, brick, and plaster.

Read more: Best Exterior Primer For Bare Wood: Reviews & Ultimate Buying Guide

The biggest highlight that distinguishes KILZ Premium from other products in the thick and creamy formula. This secret provides uniform coverage for an even finish that flattens porous surfaces and seals small imperfections.

However, high-hide stain blocking primer only works on properly sanded surfaces. They must be free of dust, grease, chalk, mold, rust, and peeling paint before priming. The result will turn out unsatisfying without preparation.


  • high-hide stain blocking 
  • Excellent adhesion
  • Multi-surface 
  • Efficient sealer


  • Do not work on heavy stains
  • Sanding required

KILZ 2 Multi-Surface Stain Blocking – Best For Mildew Blocking


This Multi-Surface Stain Blocking Latex is another option for both interior and exterior. It sticks well to surfaces and completely hides previous colors, helping the finish color come true with a little effort. 

Mildew blocking technology is the best part of this product. The molecular particle bonds together to create a mildew resistant film. It resists the absorption of stains and dust. 

When liquid touches the stain blocking film, it will form drops and run down. Solid stains will only settle on the surface and cannot penetrate deeply into the paint. This quality makes cleaning easier and more convenient.

Besides, with the lump-free formula, KILZ 2 dries to touch within 30 minutes and is ready to recoat in an hour. It is an adequate liquid to be applied with spray, helping your work get offloaded. 

However, some feedback indicated the finish paint is not smooth. For filling porous surfaces, you may consider KILZ Premium.


  • Mildew resistant finish
  • Strong adhesion
  • Dries in a haft of hour
  • Applying with spray


  • Non-smooth finish

KILZ Original Multi-Surface Stain Blocking – Best For Pet Odors Blocking


It’s easy to find a primer that is good at covering stains. But do you believe KILZ Original can also blow away unpleasant odors, such as food smell and pet odors?

This oil-based primer is an excellent odor-blocker. It is exceptional at blocking odors and sealing stains and does not produce an awful odor after painting. It gives your space a spring scent. 

Odorless technology protects your interior from unpleasant odors and proactively resists stains on the wall, keeps the wall clean, and helps homeowners save time cleaning the house and have more time to enjoy quality family life.


  • Blocks stains and smells
  • Good for most wall surface
  • Low odor
  • Achieves good color consistency


  • Works only on nonporous surfaces

Rust-Oleum 2004 Zinsser Bulls Eye 1-2-3 Primer – Best For Rust Resistant


Rated as one of the best water-based primers for interior and exterior, Rust-Oleum 2004 Zinsser Bulls Eye 1-2-3 has highly rust blocking ability. Being a protective enamel paint, it is excellent in rust sealing and smoothing the surface.

The formula contains a rust inhibitor sealing rust on the old metal surfaces. This characteristic creates an ideal primer for painting without sanding, tiring you when proceeding with your painting project.

Dealing with glossy surfaces also is overloaded labor. Some primers require a free of a porous surface before coating, but Rust-Oleum 2004 Zinsser does not. Excellent adhesion enables the application on most surfaces without preparation.

This product offers extra protection, making it useful in any weather condition. Besides, the water-based formula helps the cleaning project easier. Your old primer will be removed just by a little warm water with soap. Then it is ready for something new.

The creamy water-based formula is designed for a thicker protective coat. Thus, it is not good for using with spray.


  • Rust resistant and rust preventative
  • No sanding required
  • Adheres well to glossy surfaces
  • Cleans easily with soap and water


  • Not good for using with spray

Rust-Oleum Painter’s Touch 2X Ultra Cover – Best For All-in-one


Dealing with a new painting project, Rust-Oleum Painter’s Touch 2X Ultra Cover is a must-buy for saving your time. The 2X Coverage allows a smooth surface with only one coat. A tough and attractive finish sticks well to multiple interior or exterior surfaces.

This paint-and-primer-in-one provides long-lasting protection under a colorful finish. It offers superior coverage, blocking stains and sealing porous. 

At the same time, it beautifies your stuff with rich color and a smooth top-coat. This primer is an excellent solution for faster project completion.

Spraying will be more excited and less tired thanks to a wider finger pad designed on the spray tip. It is also ideal for spraying any angles and dries to touch in 20 minutes.

They are available in various colors, including Evening Navy, Deep Teal, Citrus Fields, Desert RoseIt, Semi-Gloss Black, and so on. They will bring out the beauty in your project.

However, this product is good for a new or well-prepared project. When dealing with a full of rusts, stains, and porous, we do not recommend this product because a paint-and-primer-in one does not work as a true primer.


  • 2X Coverage
  • Paint and primer in one
  • Comfort spray tip
  • Variety of colors


  • Not right for rough surfaces
  • Sanding required


Q1: Do you need to prime old plaster before painting?

A: Yes, you do. Old plaster is full of rust, stains, porous, and dust. If you do not prime it before painting, the surface may be peeled, blistered, and exposed from mildew growth. The primer is needed for a long-lasting and smooth finish.

Q2: How do you smooth plaster walls before painting?

A: An excellent painting project requires a smooth surface before coating. But plaster walls do not satisfy such a condition. 

The surfaces always are full of wrinkles, troughs, valleys, and hills, making your painting far from the ideal result. But do not worry. There are a few tips for a faster and more efficient project.

  • Skim Coating: Flat a rough plaster by another coat is one of the more popular methods of getting plaster walls smooth for painting. 

Firstly, it is needed to apply a coating of PVA bonding to stabilize the surface and create a high adhesion to a skim coat. Then you put a slim coat of plaster on top.

  • Fillers: If your wall is full of cracks and craters, using a filler for smoothing them out is a solution. Filling them up provides a more even surface for painting. 

Usually, you may have to fill deep holes twice, as the filler is likely to shrink upon drying. Then, using some dry sandpaper to flatten it is a must step for finishing your job.

Finally, it is recommended to put the primer on before painting for a lasting and attractive finish.

Q3: Can I use PVA to seal plaster before painting?

A: Yes, you can. You need to apply a coating of PVA bonding to stabilize the surface and create a high adhesion. 

We advise you to pay some money for professional plasterers, as their expert knowledge and experience will bring about a satisfying outcome. We do not recommend you to do it by yourself unless you are under adequate instruction.

Q4: What happens if you don’t mist coat new plaster?

A: Not applying a mist coat on a new plaster may cause some troubles below: 

  • Too quick to dry the surface.
  • Not creating an adequate adhesion to the paint.
  • Not professional finish with peeling and blistering.

Q5: Do you put on bare plaster before painting?

A: Putting on bare plaster is an essential step before painting. It provides a flat surface for a sufficient finish. 

Best Primer For Plaster - A perfect protector of your house