Why do you need wall primer??

A vital but frequently disregarded part of any painting project is wall primer. It serves as a primer that is applied to walls before painting and is essential to getting a perfect, long-lasting finish. Consider it the base of your paint job, providing a level surface that improves durability and adhesion.

Paint coverage can be improved with wall primer, which is one of the main benefits of using it. Primer helps paint adhere better by generating a uniform surface, which lowers the number of coats required to achieve a smooth finish. This will not only save you time, but it will also use less paint, saving you money on your project.

Wall primer aids in stain and discoloration prevention in addition to improving adhesion and using less paint. It covers porous surfaces and prevents stains—like those left by crayons, smoke, or water—from seeping through. This guarantees that there are no unpleasant surprises and that the paint color you choose will appear true to life.

Furthermore, applying primer helps extend the life of your paint job. It creates a barrier to shield the wall surface from moisture and other elements, which lessens the chance that it will eventually peel, crack, or blister. Investing in primer can help your paint job last much longer, whether you’re painting exterior or interior walls.

The meaning of priming

Priming surfaces was a practice that man adopted early in history. Painters were the first to do this because paint cannot be applied to canvas without a specific primer. The painting’s base became dense and uniformly rough due to the primed surface, which also made it comfortable for the master to work on. The paint held the paint firmly. The modern primers have the same built-in functions. Cushioning:

  • saturates the wall surface with moisture before applying plaster, which prevents it from taking water from the solution;
  • creates a film with deep penetration into the wall (up to 1 cm), which significantly improves adhesion between its surface and the plaster;
  • removes dust, including in places inaccessible to a brush or vacuum cleaner;
  • muffles color spots on the wall (but not a transparent primer), turning its surface into a more monochromatic one, which is very important when wallpapering concrete;
  • creates a smooth, easy-to-finish surface.

Before plastering

One crucial detail to remember when performing cosmetic repairs on an apartment or house is that the walls need to be primed before plastering.

And allow some specialists to demonstrate that plaster lasted for decades without priming in earlier generations. For one thing, it is impossible to agree with them because, in the past, walls were reinforced with metal plaster mesh, which rusted and frequently seeped through the wall’s decorative coating.

Thanks to the right primer choice, concrete can now be plastered without the need for reinforcement. By priming walls, you can:

  • Saturate the walls with moisture, as a result of which the chemical reactions of hydration of cement or gypsum are not interrupted due to lack of water (as is known, a number of wall materials – concrete, aerated concrete, brick, etc.d. – has the property of capillary suction of water molecules from solution);
  • Increase the strength of the wall surface while simultaneously creating good adhesion with the plaster solution. Deep penetration primers are absorbed into wall material up to 1 cm, leaving a continuous film on the surface. When applying plaster, the film adheres to particles of cement or gypsum, providing a strong connection between the wall and the plaster;
  • Bind dust, which actively counteracts any connecting processes;
  • Achieve family budget savings. A wall treated with a primer has a smoother surface and good adhesion, which allows layers of plaster to be applied evenly. Therefore, it will be required less when compared with the consumption for a wall not treated with primer.

Selecting a primer for plastering concrete requires great caution. Here for sale are our own primers. Therefore, you should only use a "concrete contact" primer when using gypsum solutions. This type of primer binds dust, saturates the wall with moisture, and forms a film with high adhesive properties because it contains quartz sand.

For information, a primer with "concrete contact" qualities can also be used when leveling plasterboard walls with gypsum-based glue, plastering on polystyrene foam, and laying plasterboard with ceramic tiles.

Using "betonokontakt" underneath cement mortars is not advised.

Why prime walls before puttying?

Here, the response will be unclear. Many arguments in support of this technological operation will be made by producers, retailers, and hired experts.

Professionals with no interest in the subject would prefer to say no than yes because it is easy to select a combination of putties and plaster mixtures when the solutions’ adhesion is nearly flawless and primer is not needed.

Life made its own decision on the matter. When putty manufacturers realized there was little need for primers, they began making putty mixtures that didn’t require priming surfaces. Vetonit LR+, KR, JS, Osnovit Ekonsilk, Plitonit KP, Kreps KR, and so on are a few examples. Additionally, this list is always growing.

In conclusion, priming the walls before applying putty is not required. One of two approaches will suffice: either choose putties and plaster that adhere well to one another, or use putties designed specifically to avoid priming.

Why do you need a primer for walls under wallpaper?

The advent of novel wallpaper varieties—heavy, water-diluted, etc.—made the adhesion procedure challenging. You can’t just glue them; they don’t fit right, they get sticky with glue and dust, you have to keep an eye on the glue all the time because it dries quickly on fallen wallpaper, etc. Here, a primer is required.

Customers or their advisors who are not professionals often question why primer the walls before adhering the wallpaper, arguing that the reason they are falling off is not because soil is not applied, but rather because of the master’s hands growing out of nowhere, drafts, or poorly prepared walls (roughness remaining, sharp surfaces and t.d.). Temperature and humidity variations also have an impact on the wallpaper’s longevity.

I have to admit that I agree with this. However, nobody asserts that a decorative coating’s service life can be extended by applying a primer. For ease of use during operation, soil is required, allowing you to save time and materials (wallpaper, glue). By using a primer, you can:

  • Make the wall clean and not dirty, which is very important for paper-based wallpaper. Having removed the dust, you don’t have to worry about glue getting on the surface of the wallpaper, which very often happens when cleaning air and excess adhesive mixture from under a sheet glued to the wall;
  • Saturate the wall with moisture. As a result, wallpaper glue dries slowly and does not require reapplication;
  • It is easier to join wallpaper according to the pattern, to expel excess glue and air;
  • Glue liquid wallpaper (wetting the walls with water before applying it to the wall does not always give the desired result).

The benefit of primed walls is this. The cost of applying and buying a primer will marginally increase the cost of repairs, but it will enable you to get superior decorative work.

Before applying paint

Why is a primer necessary before painting a wall? Typical response:

  • improves grip;
  • strengthens the surface;
  • levels the wall;
  • removes dust.

Still, this is not the most important thing in this situation. By priming the wall, you can use 80% less paint than you would need to paint an unprimed wall. Reductions of 20% on paint and varnish materials can considerably lower the cost of repairs.

Paint consumption can be decreased for a number of reasons:

  • The pores and voids in the wall where more expensive paint would fall are closed.
  • There is no need to rub paint on a primed wall with a roller or paint brush, as a result of which the paint layer is thinner.
  • When applying paint to even, smooth walls, it can be diluted to a thinner consistency.

Expert painters primed walls well before the invention of specialty primers, which is why they are still perplexed as to why, if special paint mixtures could be used for both painting and priming, they should prime walls first.

It’s easy to make your own primer by diluting paint with solvent at a 1:4 ratio. While serving all the purposes of a primer, diluted paint applied to the wall is just as effective as unique primer mixtures.

In building and remodeling projects, wall primer is crucial because it creates a uniform and smooth surface that gets surfaces ready for paint or wallpaper. Paint adhesion is improved, coverage is increased, and durability is enhanced. Primers also seal porous surfaces, preventing uneven paint absorption and guaranteeing a more polished appearance. Using primer is an essential step in any decorating or renovation project because it can greatly enhance the quality and longevity of your wall finishes.

Although wall primer may appear to be an optional painting step, there are several advantages to using it. Primers fill in flaws like tiny cracks and holes to produce a uniformly smooth surface. This increases the longevity of the paint job in addition to improving the visual finish of your walls. Primers improve paint adhesion by forging a strong connection between the paint and the wall surface, which lowers the likelihood of paint flaking and peeling over time.

The capacity of wall primer to seal porous surfaces is another important benefit. Paint is unevenly absorbed by porous walls, resulting in blotchy or uneven color distribution. In order to stop paint from soaking into the wall too quickly, primer serves as a barrier. This ensures that the paint is applied more evenly and that the final color looks true to its shade. Using primer ensures a consistent and polished finish, whether you’re painting freshly installed drywall or covering previously applied paint.

Wall primer not only helps to improve paint adhesion and color consistency, but it also keeps stains from leaking through the paint. Some stains, such as smoke or water stains, can cling to surfaces and show through several coats of paint. Primer has chemicals in it that prevent these stains from coming back, leaving your paint on a spotless, perfect surface. By avoiding the need for multiple coats of paint to cover up stubborn stains, this saves you time and effort.

In conclusion, even though it could be tempting to forego the primer and start painting right away, spending money on a high-quality wall primer can have a big impact on how well your painting project turns out. Primers provide a smooth and uniform finish and increase durability, which are the cornerstones of a successful paint job. Don’t undervalue the use of primer when painting a room or updating an old surface if you want to accomplish expert results that will last for years.

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Milan Yashina

Design engineer, specialist in development of design documentation. I will help you correctly design your home or other building.

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