We perform the priming of the walls in front of the putty

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We perform the priming of the walls in front of the putty

Priming the walls before the putty absolutely must be done, because it will ensure a reliable contact of the materials of the finish with the wall and allow the result of the repair to last as long as possible.

Application of soil serves several purposes:

  • improves the adhesion of paint and putty to the finish surface;
  • strengthens the base;
  • levels the surface;
  • improves( reduces) the absorbent properties of the surface;
  • protects against mold and fungus.

For priming, special mixtures are used, and there are concrete for concrete, metal, wood, stone, brick.

The primer can be in the form of a concentrate, which is already ready for application. It is worth mentioning separately about the types of primer.

Contents:

  • Primer types
  • Primer mistakes
  • Application of primer to the surface
  • Conclusion

Primer types

Priming of walls before application of putty is a collective concept, the essence of which is revealed in use for a specific type of surface composition.

Today there are 7 kinds of primers:

  • Acrylic - as well as paint, such a primer is used for all surfaces, including old or new plaster, concrete, cement, wood, brick, chipboard and fiberboard. Acrylic primer does not smell chemically and dries very quickly - for 3-4 hours. Acrylic primer does not protect metal surfaces, but, on the contrary, due to the moisture and alkali content promotes the growth of rust;
  • Alkyd - the best choice for wood. When applied, it swells, which creates a surface that is susceptible to many topcoats. The soil dries in 10-12 hours and varies depending on the main component - zinc phosphate or zinc chromate. Primer can not be closed plaster and plastered surface;
  • Glyftalovaya - used exclusively in dry rooms. Dry for the whole day, can be applied as a primary coating in front of the main one on the metal surface;
  • Perchlorovinyl is the best choice for metal surfaces, also concrete and bricks. At room temperature dries in 1 hour, but in an unventilated room, and even more so, residential, is not used categorically;
  • Polyvinyl acetate - the record for drying speed - only 30 minutes! But its use is extremely narrow-oriented - strictly for polyvinyl acetate paint and only;
  • Polystyrene is a very toxic primer that is not used indoors. Suitable for the most part as a sub-layer of wooden and plastered surfaces;
  • Phenolic - the primary coating for metal and wood, dries in 12 hours.

Errors in priming

Before we describe a really simple instruction( with video) on the priming of walls, familiarize yourself with the mistakes that homeowners often make when trying to perform priming with their own hands.

If the wall is intended for painting, then without priming, the paint will last 5 times less than the required time: after 1-2 years it will crack, sometimes swell, and start to fall off.

Video:

It is always better to once again coat with a primer, after all, whatever surface you treat with putty, gypsum or alabaster, rather than miss this preventative measure.

Primer is used on any surfaces - before and after the walls are leveled. So, if you ignore the priming and immediately shpatlyuete all irregularities, there is a risk that the putty will be unreliable.

It is impossible to mix at first glance the same compositions from different manufacturers!

Their properties can change both when mixed in one mixture, and after - if one section is covered with one compound, and the other part - with another. If primed, then only one brand!

Rarely occurring advice: add a couple of drops of bright pigment to the composition before application, and you will see where it is painted, and where not. Anyway, the primer will eventually be closed by the finish coat.

Breeding all the soil in the water at once is a luxury, not otherwise: at best you will spend half of the mixture on the wall, and the rest can be useful in the future.

Use in addition to the roller and brush: joints of walls and all corners, too, must be primed.

Priming of walls with water-based paint and polymer compounds is unacceptable: such compounds easily absorb water, which will manifest itself in six months or a year in the same bathroom, toilet.

Let's say you have chosen acrylic, water-dispersion paint for coating. So the soil should be similar to acrylic.

The unspoken rule of soil selection: the soil is selected first of all taking into account the features of the surface and the room and only after the selected several species is chosen the one that best suits the desired finish coat.

And remember the main thing - the primer is not a whim, but an important element of protecting the future coating, because in any case it should be applied. And sometimes two, and three times in succession for a reliable result.

Video:

In addition, the price of the ground does not necessarily indicate its "super" composition: the simplest domestic will cope as well as any European.

And the price for the most part - the fee for the brand, although among the imports there are really unique compositions.

But they are mostly needed for piece work with expensive materials that are not used in normal repairs.

Application of primer to the surface of

Before we begin to apply the primer, we will acquaint ourselves with the basic rules. Use rubber gloves: primer - aggressive environment. Wear gloves and goggles.

If you use a spray gun, be sure to wear a respirator. Do not be too lazy to read the packaging and instructions to the acquired soil - there is indicated the method of preparation.

The surface must be free of dust and debris before priming. If the surface is wooden, then all burrs are removed. Shake the primer before use.

Pour it into the tray with a ribbed face, dunk the roller in the tray, walk a few times along the edges and then roll on the wall.
Video:

Apply the roller with strictly vertical movements - so the surface will be covered evenly.

Using a spray gun, pay attention to whether all areas are equally sprinkled with soil or not. Process the wall in parts: charted a square meter, processed, went on.

Treat the wall with the first layer - let it dry completely. After re-cover the entire wall with soil again, this will result in a completely uniformly impregnated surface.

Dilute the formulation in a plastic bucket according to the instructions.

Do not pour more water, despite the fact that the composition may seem thick - the primer will be blotted out and will not hold on to the wall at all.

Mix in a bucket with an electric drill with a mixer-mixer composition to homogeneity: notice, after mixing, the composition will slightly thicken - so it should be. Apply soil evenly.

There is an opinion that the brush can easily be applied primer - it's wrong!

First, you will spend a lot of time, applying a primer with a small brush, and secondly, the brush will begin to lose its pile and you will have to revise the whole surface for a pile after that.

Do not allow the appearance of puddles on the wall - use a better roller( as in the video): it is wide and comfortable, and if it is also with a telescopic tube, it is possible to primed at least the ceiling.

A good primer is always double: apply a second coat after drying, and then the primer will completely fulfill its properties.

Conclusion

Priming is such an important procedure that its thoroughness and fact of performance generally determine the quality of the subsequent finish.

Primer is a bonding agent between the wall and the subsequent coating, therefore it can not be neglected.

Video:

In addition, considering all of the above, it turns out that the priming of the walls with their own hands to perform under everyone's power. The main thing is to choose the right soil and clean the walls well.

And you do not have to have a lot of experience with a roller: it's wet and razkatal-wet. That's the whole technology. It is worth mentioning separately the cost of the soil.

The price for primers is generally small - about 150-200 rubles for each liter, but the price of concrete-contact is higher, besides it is sold in cans and the most expensive that can be found on the market today - imported soil in a canister of 20 liters perprice of a maximum of 2500 rubles.

This 20 liters is more than enough for tens of square meters of the wall area. The price, of course, varies depending on the composition, the country of the manufacturer, but is available to all.

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