Considering that wood is a natural material, it needs to be coated with protective compounds: varnishes, paints, antiseptics , fire retardants
Wood is one of the most demanded materials for construction, which does not lose its popularity in our time. The main qualities for which we love wood are environmental friendliness, comfort, visual appeal and good thermal insulation.
Let's talk in more detail about what paints for wood for interior and exterior work exist, and what to choose.
In this article we will talk about the types of paints for interior and exterior wood processing. We will analyze the compositions, advantages and disadvantages, technological and operational characteristics.
Find out how oil-based paints differ from water-based or water-based paints. What are the application features of rubber, acrylic, alkyd paints, and which manufacturers can be trusted and which are not.
A good preservative for wood treatment should have the following functions:
Wood paints based on acrylics, oils, rubber, alkyds. Each of these finishing materials has its own advantages and disadvantages, so let's try to dwell on all the nuances and decide on a further choice.
Before applying decorative paint to wood, cover the material with antiseptic protective compounds.
Antiseptics can penetrate very deeply into the structure of the tree, thus providing reliable protection. It often happens that the funds penetrate deep into the level of 0.7 cm.
Antiseptic compositions are produced in two forms: covering, glazing.
For glazes, the structure is transparent, therefore it does not overlap the natural beauty of the tree, but only emphasizes it. Covering or opaque antiseptics hide the wood pattern and texture. Here, everyone makes a decision for himself, and both antiseptics provide good protection.
Oil-based paints for wood contain dyes and binders.
As the latter, drying oil is most often used. Fine dispersion mineral powder is used as a dye. A high-quality oil-based paint should have a number of characteristics that you should pay attention to.
Powder particles often settle on bottom of the container, forming a sediment. Therefore, it is recommended to stir the paint before use.
In oil paints for wood, the level of substances forming a film should be 25% of the total volume. Here the principle works, the more the better. It is he who guarantees the durability of the coating.
Also, do not forget that an open jar cannot be kept in this state for a long time, otherwise it will dry out.
The percentage of volatiles should be at 10% of the total. The disadvantage of these substances is toxicity, they begin to evaporate at a temperature of + 20 ° C. Therefore, when working with oil paints in warm weather, it is imperative to use respiratory protection.
A grain size of 90 µm results in a smooth mirror finish.
Larger particles give a roughness effect.
The level of consumption of oil paint depends on its thickness, viscosity, porosity, and the time it takes to dry. The viscosity of high-quality dyes ranges from 65-140 units, the drying period is not more than 48 hours. Moisture repulsion should be 100%. Paints that are intended for interior decoration may have less stringent requirements.
Oil-based paints for wood are not compatible with acrylate-based paints for exterior wood finishes. Therefore, before applying them, the old coating must be removed if necessary.
Base the composition of such paints is alkyd varnish, which in turn is divided into glyphthalic and pentaphthalic.In everyday life, the second option is used, resembling a very thick resin, which must be diluted with a solvent. Also, this paint contains rosin, oil and glycerin. Fillers in the form of very fine flour may also be present: marble chips, granite chips and sand.
The main advantage of alkyd paints for wood is the durability and elasticity of the coating. It takes a little time to dry the wood, about 6 - 12 hours. This process is influenced by the level of moisture in the air and its temperature. The coating does not fade and does not shrink.
The markings on the cans of alkyd wood paints indicate the specific composition. PF-115 - contains pentaphthalic varnish. This paint is used for working with wood and metal, resulting in a glossy finish.
Gloss alkyd paint is best suited for exterior wood finishing.
This is due to the fact that such compositions last 20% longer, and the consumption is about 150 g / m².
Acrylic paints for wood are created on water-soluble compounds of artificial origin.
These are acrylic based emulsions with polymers that bind water and pigment. Also, to improve technological characteristics, other components are mixed in production.
They are also designed to enhance ink storage.
Water-based acrylic paints must not be stored at low temperatures.
When the paint cures, a thin film is created on the top layer, with good adhesion properties. This allows you to resist the aggressive effects of the external environment.
Acrylic paints for wood are reasonably considered the best for finishing wood structures, since they have a number of significant advantages over other compositions.
Acrylic paints have practically no drawbacks in use, they may have only some restrictions in application.
For high-quality application of coloring compositions, you need to make a preliminary calculation of the consumption of paint on wood. On containers, the approximate consumption per 1 m² is most often indicated, for acrylic paints for wood it ranges from 130 - 200 g / m².
Layers are applied one by one, after each previous one has completely dried, otherwise the layers will float and look sloppy.
The low price of acrylic paints for wood for outdoor use should attract, but on the contrary, alert. It is better to purchase products from well-known manufacturers who have already established themselves.
Paint based on latex and rubber is a modern finishing material for wood, which has improved characteristics for use, and even in some ways, much better than other dyes.
The composition of these materials is simple - water and acrylates. Latex paints are still considered to be of higher quality, all this is achieved through innovation in production.
Alkaline products can be used to clean surfaces painted with rubber wood paints.
After the paint has dried, the surface will have a pleasant-looking velvety and strong finish. One of the advantages of latex dyes is the elasticity of the coating, due to which it can stretch without cracking. The disadvantages include the high cost of the finishing composition, so it is not in such great demand as, say, acrylic paints.
Russian brands cannot yet stand in this row of quality manufacturers.
The undisputed leader is the Finnish paint for wood Tikkurila with paints based on alkyd-urethane and polyurethane-acrylate components. .
Water-based paints for wood are popular for their environmental friendliness and durability. In general, dyes for decorating walls inside a wooden house are not subject to such severe requirements as for compositions for external work. The only thing to remember is that pre-treatment with antiseptics still needs to be carried out.
Water-based paints for wood have water as a thinner, so they are rightfully considered the cleanest, most environmentally friendly and non-flammable. Resin or oil are used as binders. The production of such paints occurs in the form of a paste of liquid structure, which must be diluted with water in a certain amount before use. After applying paint for interior decoration of wood, the water evaporates, the coating hardens.
Advantages of water-dispersible paints for wood:
Use water based stains to paint wooden doors and maintain their texture.
A house made of timber, can be painted from the inside with acrylic paints, if there is no purpose to sheathe it with other finishing materials.
The high level of vapor permeability of such paints provides a more favorable microclimate for housing. For children's rooms, acrylic paint is suitable, which is easily washed off and does not contain hazardous substances.
Buy acrylic or latex compounds for kitchens and bathrooms, as they contain antibacterial ingredients to help keep mold and mildew free.
To paint the walls in the kitchen, paints will do, from which it will not be difficult to wash off grease and dirt.
For the hallway and corridor, there are paints with high resistance to abrasion and deformation - these are acrylic-latex compositions.
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