Painting is one of the most common finishing methods in construction or renovation. So that the result does not disappoint, it is important to choose the right paint. Acrylic paint for facade works successfully competes with other compounds in the finishing materials market. Let’s figure out what is the reason for the popularity of the coloring agent, and how to use it correctly.
When dry, the coating is a thin but strong plastic film. For facades, compositions on an organic basis are usually used, since they dry faster and are well applied both at subzero temperatures (up to -20 ° C) and in hot weather (up to + 30 ° C). On a warm, quiet day, you can paint the walls of the house outside and with a water-soluble agent. So, acrylic facade paint contains:
the smallest particles of polymers;
binder (water or organic solvent);
pigments responsible for color formation;
fillers that impart specific properties to the coating (moisture resistance, defoaming, antiseptic effect, etc.).
Usually, acrylic-based compositions in a wide range of colors go on sale, but if you wish, you can purchase white paint and carry out tinting on an individual order or on your own by adding a liquid pigment.
In terms of technological characteristics, polyacrylic facade paint is superior to compositions based on oil or alkyd bases. Particularly in demand are water-dispersion compositions due to the complete absence of a sharp “chemical” odor and high environmental friendliness. The general properties of acrylic coating are as follows:
color stability even under the influence of ultraviolet rays;
elasticity of the film after drying (the surface will not be covered with cracks, the paint will not crumble despite temperature changes);
vapor permeability (painted walls will be able to “breathe”);
high degree of adhesion to the base;
resistance to mechanical damage;
good hiding power (to obtain an even coating in tone, it is enough to apply two layers of material);
the possibility of finishing surfaces from different materials (wood, brick, concrete, plaster, metal, etc.);
ease of use, affordable price.
In addition to the obvious advantages, there are also some features. For example, to give a mirror-like shine to a painted product, you will have to cover it with a transparent varnish and polish it. Exterior acrylic paint gives a matte effect with a slight gloss.
Also, when working with this material, it is necessary to wait for the fresh layer to dry completely before applying the next one, otherwise the coating will turn out with visual and mechanical defects.
Interesting: for artistic wall painting, it is the facade paint on plaster for outdoor work that is used. Due to the high technical characteristics of the material, the images are very durable, and the rich palette allows you to create paintings of any complexity.
Important: when purchasing acrylic white, pay attention to the degree of whiteness of the solution. The quality of the white pigment determines the brightness and purity of the shade during tinting and after the material has dried. The milky color of the base composition is not in favor of the product.
When ordering tinting white or creating an original shade on your own, you should take care of a small stock in order not to get into a difficult situation if the paint is not enough, because it is almost impossible to accurately reproduce the same color at home, and a repeated visit to the building market will take time. In general, you can read how to tint acrylic paint in a special article.
Acrylic paint for various surfaces
Acrylic dye is consider universal, since it is used in work on various materials, but this does not mean that the application technology is the same in all cases. The choice of a specific composition is also important.
For finishing the facades of wooden houses, painting gazebos, baths, fences and benches, paint should be purchase that contains the following components:
antiseptics (protect the surface from the appearance of mold and insect pests);
fire retardants (substances that prevent combustion will help buy time and save the structure in the event of a fire).
Wooden surfaces need preparation before painting. The process has several stages.
Cleansing from any kind of pollution. Dust, mold and old coatings should remove. If the walls have already paint with acrylic paint, and it holds well (does not swell, does not fly around), then you can not clean off the old layer, but do with washing off the dirt. This is usually done when making cosmetic repairs in order to refresh or change the color of the structure.
The wooden surface
It is important to rub all potholes and cracks with construction paste.
A special wood primer is apply. It is great if it also contains an antiseptic; this will enhance the protective properties of the coloring material. The joints should treat with a sealant.
This prepares the walls for painting. This condition is imperative in cases where a very smooth finish is required. Finally, the last layer is applied.
When painting large surfaces, you can simplify the task and do without sanding. If all the rules are follow, the coating will have a presentable appearance and will last a long time.
Despite its strength, this material has its weak point – it is prone to corrosion. Unless the roof of the house is cover with gilding or other non-ferrous metal, and the gate is not cast from silver, it is better to protect the structure from the harmful effects of moisture. So:
A well-worn metal surface with traces of rust will have to be treat with a hard metal brush or use a special wash to remove the layer destroyed by corrosion.
A clean surface should treat with a metal putty (if there are flaws in the form of deep scratches or dents), prime with a compound with an anti-corrosion effect.
Now you can apply acrylic paint for exterior work. The cured film will block the access of moisture to the metal and provide reliable protection against destruction.
Important: the coating is resistant to high temperatures (up to 120 ° C), so painting a metal roof with acrylic paint is an excellent solution. It is better to choose the lightest shade so that it is not too hot in the house in the summer.
Brickwork is in vogue, so often houses are not plaster outside, but paint with acrylic paint. This is a good way to protect the walls from destruction under the influence of temperature and humidity changes, as well as to give the structure an elegant and well-groomed look. You cannot do without preparation.
The brick facade is clean of dirt, efflorescence and oil stains.
Eliminate signs of destruction with a starting putty.
The surface is prime twice, since the brick is highly absorbent. It is good if the primer contains not only antiseptic substances, but also a sealant.
For brick facades, paint consumption is approximately double as compare to smooth surfaces, and you will have to work with a spray gun or flat paint brushes of different widths, if you care not only about the aesthetic component. It will not work to paint the wall with a roller; the protective properties of the coating can be apply in this way leave much to be need.