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Types of coats

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Primer - a special liquid formulation that is applied onto the surface before painting, putty and other works.Usually it consists of film-forming substances (oils, resins, asphalts, various types of adhesive), pigments, drying accelerators, and other additives.Base coats may be mineral, acrylic, alkyd, oil, etc.The paint is almost always better falls to the ground having the same basis.

Content

  1. Why primer
  2. Applications primers
    • priming mineral surfaces
    • Processing
    • wood Primers for metal
    • primer for other surfaces
  3. Certain primers

in the recent past for priming the walls and ceilings using wallpaper paste (if required under the wallpaper primer), diluted with water, PVA glue or lime, strongly diluted paint thinner.Wood treated with linseed oil.Now on the market of paints you can buy cheap generic primers and qualitative proprietary nature formulations known manufacturers.

Modern industry offers a wide range of construction pri

mer compositions: primer deep penetration, reducing the absorbency of the surface, to strengthen and improve the adhesion primer, insulating, corrosion, fungicide, antiseptic and other primer.

conditionally divided into impregnating primer (used for primary processing base) and improves the adhesion of the compositions.In commercially available ready-mix and be diluted with suitable solvents dry basis for the soil.

Why primer

First priming helps to impose successive layers more efficiently.Moreover, the coating is much longer downtime.Some types of primer compositions may regulate the porosity of the basics, to strengthen it.There are a mixture of different anti-wear materials and protect them from corrosion.

In addition, the use of primers for painting will significantly reduce the consumption of expensive paint.Thanks to them, the paint falls even layer, smoothed minor defects.

Applications primers

The main factor influencing the selection of the right type of primer, a base material.Therefore Priming compositions for their applications can be divided into the following groups:

priming mineral surfaces

to mineral surfaces include brick, cinder block, concrete, aerated concrete, plaster, and so on.That is, materials which mainly consist of walls and ceilings of buildings.

leading positions in the preparation of the "bare walls" to the subsequent primer coating takes deep penetration.The mechanism of action which is the most deep impregnation of the base material, and the polymer component is well bonded to the base particles, leaving a porous surface to be treated.This greatly increases the adhesion of the next layer with a mineral base.Often primer deep penetration have fungicidal (antifungal) agents.

If the surface is too loose, porous, not strong, you will need firming primer.Such a mixture has in its composition more than adhesives, that is, the penetration into the material, they significantly strengthen its top layer.Note that the flow depends on the porosity of the primer treated surface.Reinforcing primer is often used when working on containing the insufficient amount of cement plaster in old buildings.But we should not forget that such a mixture of reinforcing material only in the depth of his penetration - crumbling plaster, they can not save.

Universal or general purpose primer is applied between layers of coatings.It improves adhesion, lets apply the paint evenly, etc.If it is selected, not only the base material but also layer deposited as follows.

Protivoschelochnaya primer is required only when using processing-borne paints containing alkali surfaces.These may include new concrete, cement or the treated surface by means of fire.

betonokontakt primer used for the treatment of smooth hard surfaces, such as concrete slabs, drywall or painted with oil paint bases.This mixture contains sand and cementing additives, allowing you to make the surface more rough.Thus, the smooth, poor adhesion surface is suitable for subsequent plaster, putty, gluing tiles and other finishing work.


Wood processing

treatment of wooden surfaces and parts made in several stages.First of all you need to protect the wood against biological factors causing destruction.This rot, fungus, algae, insects, rodents.To protect the used special impregnation with antiseptic, fungicide, pesticide, insecticide and other components.For maximum protection of wood is required to apply the impregnating several times.

Other primer applied to the wood before painting (in some cases, replace it): they smooth or vice versa, is expanded structure of the substrate.When used paint goes much smoother, significantly reduced its consumption due to lower absorption.

The special primer compositions for wood include tools for surface obessmalivaniya softwood.These drugs are divided into saponifiable and dissolve.After their application may need machining wood surfaces.

Primers for metal

When processing metallic surfaces (ferrous metals), with visible traces of corrosion, primarily using a rust converter.After its use the machining is carried out.And only then you can prime the surface, even if the primer contains phosphoric acid (the main component of the converter).

Anti primer before painting for ferrous metals and nonferrous use different (galvanized iron primed compositions for non-ferrous metals).

Priming other surfaces

In some cases, you may need painting materials the paint goes bad, and in some cases, and erodes their (tiles, glass, ceramics, plastics).For these situations, suitable priming compositions with increased adhesion.

There primer blocking various spots (soot, grease, etc.).When using soil against unwanted spots spots with time not tread through the paint or wallpaper.

Certain primers

emulsion or acrylic primer is suitable for almost all types of surfaces: brick, concrete, plaster, putty, plasterboard, wood, etc.The exception is the metal surfaces - most of these primers do not contain anti-corrosive component.Among the advantages of soil compositions, acrylic-based ease of use, the possibility of dilution with plain water.Fast drying (2-4 hours) and the absence of a strong odor makes acrylic primer is very convenient when working in residential areas.Acrylic-based manufactured both surface and deep penetration primer.

alkyd primer is widely used to prepare wood surfaces for painting, drying period it ranged from 10 to 16 hours.This soil composition "loosens" the top layer of wood, which significantly improves the adhesion between the paint and wood.Such soil is much increases the resistance of the coating increases its service life.Use alkyd primer for the coating of iron.It is not intended for use on mineral surfaces.

epoxy and polyurethane primer composition is diluted with solvents appropriate colors.Basically they primed concrete foundations, preparing them for the application of enamels.

shellac primer is used for processing branches in sections of softwood.Use a primer and when working with water-based stains.

Polystyrene primer used on plastered and wooden surfaces.But because of the high toxicity can be used only in well-ventilated non-residential premises or outdoor applications.

Specialized primer for metal conventionally divided into insulation, tread and phosphate.Insulating primer has in its composition zinc oxide and iron oxide.These primers do not react with the metal and to protect it from moisture mechanically.To the category of insulating primers are Gliphtal and phenol compounds.Drying time at room temperature varies from a few hours to two days.

passivated or tread primer, the price of which is significantly higher for superior insulation reliability.This group of soils can be applied to ferrous and non-ferrous metals.With a zinc content (up to 90%) such coating can be designed for use in certain corrosive environments.

phosphate primer to improve adhesion of the paint to the metal, prevent the formation of rust.Before using this primer diluted acid diluent.Apply it in several layers under resistant enamel.Priming the characteristics shown above is used for the treatment of those who are in a humid environment of ferrous metals.