Varnish for decorative plaster: which composition is better to use? Varieties, advantages and disadvantages of varnish use

A common option for giving walls and ceilings texture and personality is decorative plaster. Using a varnish is often advised to improve its appearance and shield it from harm. To get the desired look and longevity out of your decorative plaster, it is important to select the appropriate varnish composition.

For decorative plaster, a variety of varnish types are available, each with a unique set of advantages and disadvantages. Making an informed choice can be aided by your understanding of these options. Certain varnishes are made to have a glossy appearance, while others have a matte or satin appearance. Your space’s overall aesthetic can be greatly impacted by the finish type you select.

A popular option is varnish that is based on water. It is well-known for being odorless, drying quickly, and being simple to apply. It might not be as robust as alternative solutions, though. Conversely, solvent-based varnishes have longer drying times and stronger fumes but provide exceptional durability and resistance to wear and tear.

Another option that is worth thinking about is acrylic varnishes. They are a popular option for many homeowners because they offer a good balance between durability and ease of use. Although they can be more difficult to apply, polyurethane varnishes are extremely resilient and resistant to abrasion and chemicals, making them perfect for high-traffic areas.

Every kind of varnish has specific benefits as well as possible drawbacks. You can choose the best varnish to improve and preserve your decorative plaster and make sure it stays strong and attractive for many years to come by taking these factors into account and your unique needs into account.

Type of Varnish Advantages Disadvantages
Water-based Varnish Easy to apply, quick drying, low odor, environmentally friendly Less durable, may require multiple coats
Polyurethane Varnish Highly durable, resistant to scratches and chemicals, glossy finish Strong odor during application, longer drying time
Acrylic Varnish UV resistant, non-yellowing, clear finish Can be expensive, less resistant to heat and chemicals
Oil-based Varnish Durable, deep rich finish, enhances natural look Long drying time, strong odor, potential yellowing over time

Why apply varnish to decorative plaster

Experienced artisans advise applying varnish to the plaster for a number of reasons.

Among them are the following::

  1. Strengthening: the material of the base is subjected to the smaller effects of external factors, therefore, it lasts longer in its original form.
  2. Protection: varnish does not pass moisture and chemicals, and also reduces the degree of damage from mechanical influences.
  3. Antiseptic properties: thanks to a special composition on such a surface, mold does not appear.
  4. The safety of the material and its decorative properties: thanks to the varnish, the plaster burns more slowly and loses its colors.
  5. The possibility of reusable cleaning.
  6. Focusing attention on the beauty of the finish and the effect of spraying.

putty for painting

Pros and cons of the varnish on decorative plaster

Among the benefits is the fact that the varnish

  • Strengthens plaster;
  • Reduces the effects of sunlight;
  • Prevents the formation of chips, cracks, scuffs;
  • It is environmentally friendly.


There are just two flaws to be concerned with:

  • High cost of work;
  • After additional finishing, aesthetic appearance is slightly disturbed.


What varnish can be used

Regarding the query of which varnishes are suitable for plaster covering, the following can be stated: Before making a purchase, compare the characteristics of various varnishes. The type you select will determine the outcome.

It is anticipated that any type of varnish will be used for finishing on this project.

Polyurethane varnish

Acrylic lacquer

  • The composition of acrylic resins;
  • Saturated white liquid;
  • Compatible with water -based plaster;
  • Quickly dries;
  • Forms solid protection in the form of a film;
  • It can be easily repainted in a different color.

Acrylic varnish

  • + Glossy shine;
  • + Long service;
  • + Ease of application;
  • + Strength.

Malar brushes

Polyurethane varnish

  • The composition of aliphatic carbon and urethic resins;
  • Water based;
  • Ecological;
  • Suitable for the interior;

Polyurethane varnish

Among the benefits are:

  • + Reliability;
  • + Easy care;
  • + Good resistance before moisture;
  • + Pleasant appearance.

Construction gloves

Preparation of the surface for applying varnish

Preparation is one of the most crucial steps in applying plaster varnish. Put differently, you can only screen after it dries. Next, the surface needs to be wiped and cleaned.

Construction spatula

Applying a primer to the plaster in order to increase adhesion is not required. However, it is acceptable to cover the primer’s outer layer in order to save money.

If the material has a varnish layer already, it must be removed with specific compounds that have dissolving qualities.


High-quality glazing requires the following instruments:

  • Rags;
  • Foam sponges;
  • Painting brushes;
  • Rollers for acrylic;
  • Spray gun;
  • Maslar tape.


How to apply varnish

In order to prevent damage to the plaster itself, you may need to follow specific guidelines provided by the manufacturers of the composition you have selected. These specifications are listed in the instructions that are consistently packaged with the product.

  1. Before applying the screening composition, the work surface of the material is thoroughly cleaned. It is necessary to remove all the dirt and dust from it, repair the damaged places, get rid of stains and divorces, get rid of the previous finish, if any.
  2. After that, the selected place is well primed to improve adhesion.

Alciden varnish

Important: Make sure the primer’s properties match those of the original material.

A primer for walls

In order to achieve the desired density, the mixture must now be diluted with water. The instructions provide an explanation of the proportions. Water and varnish are typically separated 1:10. Up until a homogenous mass is achieved, the resultant mixture needs to be interfered with. It is possible to add dyes if desired.

When the mixture is ready, a spray gun is used to apply it to the chosen area. It’s critical that she descend in a level layer. The decorative effect will result in a brush or roller.

  • It will be more reliable to sink several layers of plaster;
  • It is necessary to finish the application of varnish at a time, because after the one layer dries, places with a more fresh coating will be clearly visible;
  • It is necessary to apply the composition with a painting roller, moving in different directions, in the case of a sponge – circular movements;
  • The varnish is applied with a thin layer;
  • So that the varnish does not freeze in the application time, the container with it must be stirred periodically.


When spraying, make sure to cover the respiratory tract and eyes.

Care, removal and correction

Naturally, extra attention must be given to such a coating. These days, the industry market offers a wide variety of remedies from which to choose.

Below is a list of strategies and tactics for reducing pollution:

  • The remover helps to remove a strong plaque and a long dried dirt;
  • The vacuum cleaner is best removed dust;
  • A rag soaked with warm water using a detergent is needed for regular surface washing;
  • Twice a week, the varnish must be treated with special cleaning concentrates;
  • Once every half a year, restorative remedies from polyurethane are used;
  • With polish you can restore the glossy shine of the coating.

Lacu ns

After some time, if you discover that your coating is being applied dishonestly, you can take the following actions:

  1. If the passes are found, a poorly executed place is grinded.
  2. The prepared area is covered with varnish. The main thing is that the layers are thin at the edges.
  3. A day after the varnish dries, a glazing composition is applied.

water -based varnish

For decorative plaster, selecting the appropriate varnish is crucial to getting the best protective and aesthetic outcomes. Different compositions, such as epoxy, polyurethane, and acrylic varnishes, each have unique advantages and disadvantages to suit a range of requirements and tastes. Making an informed choice requires an understanding of these distinctions.

Acrylic varnishes are widely used because they are simple to use and dry quickly. They give decorative plaster a clear, non-yellowing finish that accentuates its inherent beauty. They may not be as durable as other varieties, though, so low-traffic areas would be a better fit for them.

The durability and resilience of polyurethane varnishes are well-known. For surfaces that are frequently used or exposed to moisture, they create a sturdy, protective layer that is perfect. They can somewhat change the plaster’s color, but they’re a great option for outdoor and high-traffic areas because of their durable protection.

The best protection and durability can be found with epoxy varnishes, which are frequently utilized in commercial settings or areas that see a lot of traffic. They produce a robust, glossy finish that is resistant to abrasion and chemicals. The drawback is that because of their potent fumes, they are more difficult to apply and need adequate ventilation while doing so.

In the end, the particular needs of your project will determine which varnish is ideal for your decorative plaster. When choosing, take into account elements like the location, traffic volume, and desired finish. You can prolong the beauty and durability of your decorative plaster and make sure it stays a gorgeous feature in your room for many years to come by selecting the right varnish.

The durability and appearance of decorative plaster can be significantly improved by selecting the appropriate varnish. This article discusses the various kinds of varnish that are available, including solvent-based, water-based, and acrylic varieties, and weighs the advantages and disadvantages of each. Homeowners and professionals can achieve the best finish and protection for their decorative plaster surfaces by knowing the distinct qualities of each varnish type.

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Daria Yakovlev

Interior designer, author of online color design courses. I will help you create a harmonious interior using color.

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