It depends on the primers is as rugged and durable mate first layer of putty with the basics: whether it will continue to flake off, get wet, cracking, etc. Primer - one of the most important part of any process chain for high-quality finishing, repair, and the more surface color. It is designed for pretreatment of walls, floors and ceilings to plaster, putty, painting, laying tile, floor screed device, repair and restore the surface, etc., etc. No primer is indispensable for application materials to the complex surface: not enough or too porous , dusty and dirty, stained plaster or other building mortar, etc. What do we mean by the word "primer"? This is a liquid homogeneous mass consisting of a mixture of fillers and special components in the binder polymer. How to choose a primer need the application of a primer should be determined by the type and condition of the treated surface. It is also important to consider the appointment of the room: bathroom, kitchen, bathroom, etc. Priming wallpaper glue is the cheapest way, but it applies only to perfectly flat surface. Priming reduces vlagovpiyvayuschie adhesive properties of the surface, but there are many other dangers: a manifestation of yellow spots on a light wallpaper, crumbling plaster, cracks, etc. Now, replace the "outdated" way of priming the glue came the so-called spetsgruntovki. Between themselves, they differ in the constituent components, which allow to find the best coverage without sacrificing the personal finishing material. Of course, surface treatment spetsgruntovkami costs a bit more expensive than using glue. But on the other hand, such coatings can achieve maximum impact with minimal labor. Spetsgruntovki themselves spetsgruntovki do not have high decorative qualities, so to finish the front, they do not apply. But despite this fact, the primers should not be neglected. Such savings could lead to fragility of the facial covering, the more expensive waste of covering materials and as a result, increase the cost of painting works (the optimal proportion in the total number of primers used personal material should not fall below 30%). By type of binder, which is part of the primers, they can be divided into several major groups: Acrylic and acrylic kraskiprimenyayutya As for virtually all surfaces (fresh and old plaster, cement, concrete, bricks, wood, fiberboard and particleboard). These primers have attractive consumer features: they have no peculiar smell, and dries within 2-5 hours. But acrylic primers are not recommended for use as a protective coating for ferrous metals, as time on the treated metal surface can act rusty spots. Alkyd is best used when applied to the timber. They are "bloat" of its structure, resulting in a surface that is receptive to a good majority of finishing coatings. Drying alkyd primer 10-15 hours. Specialists distinguish several varieties of alkyd primer: the zinc phosphate - the best anti-corrosion primer for alkyd paint and zinc chromate - with similar properties, but with a broader range of applications (for example, designs that include the wooden items). The only significant restriction for the latter species - such primers is not recommended to cover the plaster and the plaster surface. Glyptal These primers are designed for dry conditions. Drying time - 24 hours. Used mainly for primary metal plating. Perchlorovinyl These primers are best suited for coating metals. They are also used for applying plaster, brick and concrete surfaces. As such, their benefits are particularly evident in the cold season. At 18 to 20C dry for 1 hour (for interior perchlorovinyl primers are not recommended). Polyvinyl dry up even faster - at room temperature for 30 minutes. But they are only used to create a layer under the polyvinyl acetate paint. Polystyrene contain toxic solvents, and therefore should not be used in enclosed spaces. Used as a sublayer on the plaster and wood surfaces. Phenolics are used as the primary coating on wood and metal. They dry within 10-12 hours.
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