Types of water-based paints
If you asked a question - which water-based paint is better? This directly depends on the conditions under which it will be used, as well as on the binding component included in the composition. The most popular are: acrylic, silicate, silicone and mineral compounds.
- Acrylic water-based paint - is in greatest demand among masters of finishers and builders, because it has high elasticity and strength. However, it is not cheap. The main binding component in it is acrylic resins. Also you can find the composition of acrylic paint with the content of copolymers and latex. The mixture with the first component is characterized by a lower cost while maintaining high quality. Latex adds a property such as water resistance to the material.
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Silicate paint - is a solution of liquid glass, pigments and water. This mixture has excellent physical and chemical properties, and therefore has a high resistance to weather phenomena. The painted surface can be used for more than 20 years. However, when buying one should take into account one point - how much is the moisture of the substrate above atmospheric humidity? If the base is more wet, then the silicate paint will work well. If on the contrary, then - no. This is due to the fact that these compounds have slightly more vapor permeability than the others.
- Silicone paint - is created on the basis of silicone resins and water. It combines all the properties of acrylic and silicate compounds, therefore it is considered the most advanced. Its use is limited only by high cost. When applying two layers of this paint, it is possible to cover cracks with a size of 1-2 mm, because it is often used for unplastered surfaces. Also, silicone paint is water-washable - washable. Withstands more than 5000 cycles of work with a brush.
- Mineral water-based composition - is created on the basis of cement or hydrated lime. This composition forms a fairly stable, but vapor-permeable layer. At the moment, these mixtures are practically not used in construction( they were popular about 40-50 years ago) due to the fact that they form short-lived coatings.
Sphere of use of water-based paints
The scope of this material is quite wide. Water-based paint for wood, fiberboard, particle board, gypsum board, wallpapers, concrete, plaster, brick foundations is used. Moreover, both internal and external surfaces can be removed. However, when choosing one or another water-based composition, it is worth considering the basis on which it was made. This will allow you to more accurately determine which surfaces are best used.
For example, acrylic mixtures are not suitable for buildings with damp walls( that is, with poorly made waterproofing foundations), since they do not have sufficient vapor permeability. For these purposes, silicone or silicate paint is more suitable. The latter formulations are also suitable in so-called "heavy" cases, when, for example, the old building is practically not protected from the rising seasonal groundwaters.
Mineral mixtures are sometimes used in painting( finishing brick and concrete walls and ceilings).Most suitable in cases where the building is subjected to significant hydraulic loads.
Some recommendations for the dilution and application of water-based paint
Painting with water-based composition is practically the same as oil painting. However, there are a number of recommendations, with respect to which, the work will be better. For example, you can dilute the composition with a 60% solution of sodium silicate. It is added not more than 5 kilograms per kilogram of paint.
A typical silicate adhesive glue can also be used. It is not necessary to spread paint by these components. They do it only in cases when they want to reduce the consumption. The process of painting is recommended to be carried out in 2 approaches. This will save you the need for pre-priming the base, as the composition is able to seal small cracks.
The drying time of each layer is about 1-2 hours. Applying the composition is recommended in two ways: with your own hand using a brush and roller or using a spray gun. The second option will shorten the time of work.