The process of priming walls, floors or ceilings is a key stage of repair, without which it is impossible to finish the finish in a qualitative way. Proper application of the primer mix allows you to save on other materials, as well as to achieve an excellent appearance of the surface. It is important not to rush and wait until it freezes. How much the primer dries depends on many factors, including temperature and humidity in the room, surface structure and, of course, the composition of the mixture itself.
- Types of primer
- What determines the drying time?
- Features of repair work
Types of primer
There are several types of primers, each of which is designed to perform specific tasks. Each differs in its components, which determine how long it takes to completely dry it on the surface.
- Acrylic blends are universal, they are used mainly at home to prepare walls for painting or wallpapering. But with the same success, an acrylic primer is used to flatten the ceiling or floor. The average time for its drying is 5-8 hours. The only surface on which experts do not advise the use of acrylic primer - ferrous metals, they will eventually appear stains.
- Contact mixtures have the same efficiency as acrylic, but differ in that they added finely ground quartz. This allows the composition to fill cavities more efficiently. But the contact primer due to deeper penetration dries much longer - about a day.
- For the treatment of wood and metal surfaces, it is best to use oil( or alkyd) mixtures. After treatment, the walls should dry for about 10-12 hours.
- Alcoholic solutions or drying oil are also excellent for wooden surfaces. Before processing the walls or ceiling, it is first desirable to heat by 70-80 degrees, then the waiting time will be reduced to 5-6 hours instead of the standard day.
- For concrete wall plastering or for plastering a concrete ceiling, a concrete contact is ideal - this mixture of deep penetration is just for the treatment of complex surfaces. Drying time is about 2 hours.
Directly before starting the treatment of walls or wallpapering, it is necessary to familiarize yourself with the instructions for using the mixture. It always describes the recommended operation parameters for achieving the best effect( temperature, humidity, mixture consumption per square meter, number of primer layers, etc.), and also an approximate indication of how much the primer dries.
It is necessary to adhere to the specified recommendations, since with a similar name for different brands, specific materials can be included in the mixture, speeding up or delaying the drying process.
What determines the drying time?
Experienced finishers distinguish several parameters on which depends how much the primer dries in this or that situation:
- Surface quality. On dry and porous primer will dry out faster than, say, drywall. To accelerate the process, you can immediately degrease the wall immediately before the primer. However, there is a danger - if there is too much pore, the first layer will simply absorb into the surface, and it will have to be primed again.
- Air temperature and relative humidity. The optimal parameters are: 15-20 degrees and 60-80% humidity. The room needs to be ventilated before applying the mixture, and not after, as this is fraught with the appearance of chips and cracks.
- Thickness of the layer. Naturally, the more layers deposited, the longer the drying process will last.
- Composition of the mixture. Primers with the addition of solids or easily volatile solvents( for example, concrete contact) dry faster.
After the time allotted for drying has passed, it is necessary to check the applied primer with your hand. If the wall is still wet, then it is necessary to wait another time, unless the painting technology provides for the application of paint to moisture.
Features of repair work
To accurately calculate how much the primer dries, you must also monitor its consumption. The standard recommendation is 1 liter of solution per 12-15 squares of the surface( on porous - 10-12 squares).If the mixture to spend more on a smaller area, then the drying process can be delayed.
In case of using a deep penetration primer, regardless of the base of the mixture - acrylic, oil or concrete contact, it is necessary to "throw" on top 2-3 hours from the recommended time, because due to unsuitable temperature or humidity drying may last longer.
When using a quick-drying primer, the temperature in the room should not be above 20 degrees, then the surface will dry out literally in 5-6 hours.
Before the wallpapering, especially thin, the primed surface should be checked with the utmost care, otherwise the wallpaper will just get wet and stick in a ragged appearance.
Naturally, do not forget about a number of simple rules:
- do not leave the primer to dry overnight, as the temperature difference is unfavorable for the mixture;
- close windows, windows and doors, as the presence of drafts causes uneven polymerization of the mixture;
- does not need to speed up the drying process with a hair dryer or a heat gun - after a while, the primer will simply fall off.
Thus, the duration of drying primer depends on many factors - temperature and humidity in the room, the nature of the surface and other external parameters, however, the main thing that should be paid attention is the composition of the mixture. Betonokontakt freezes faster( literally within 2-3 hours), the longest contact primers dry( up to a day).To ensure proper drying of the composition, temperature, drafts and excessive heating should not be tolerated.