It is not easy to choose the paint for exterior surfaces: unlike the paint for the interior, the paint for exterior surfaces will be constantly subjected to such irritants as rain, wind, mud, etc. Also, sometimes to achieve the desired effect, mixing the paint with other additives is necessary. It’s important to pay attention to each of the paint characteristics individually to achieve the desired result:
1. Vapour permeability. This should be quite high because when the vapour has nowhere to go, it condenses and moistens the inner surface of the paint film. To achieve this effect, look for paints with vapour-forming additives.
2. Minimal detachment of the paint from the base. Here the solution is simple: select the paint with the same components as used in the primer.
3. Hiding. You have to pay attention to that too because the better paint covers up, the fewer layers of it you have to apply.
4. Water dispersions. Sometimes this can play a key role in the integrity and safety of your home because, for example, on cement plasters, alkyd and oil paints are not recommended. It should be noted that water-emulsion and water-dispersion paints are the same.
5. Synthetic paints. Such paints include oil, perchlorovinyl, organosilicon, pentaphthalic, and chloro-sulphur based polyethylene. Some of them can even be used at low temperatures. However, Boris Does does not recommend using psychedelic paints in interior painting, as they are quite toxic.
Also, before choosing paint, check if it is suitable for the material of your exterior surface.