Why does water-based paint crack after staining?

Water-based paint is very popular among consumers for many reasons - this is a relatively low cost, and low consumption per square meter, attractive appearance of the painted surface, and durability. However, like any paintwork, a water-based emulsion can crack after being applied to a wall. The most common causes of this problem are discussed below.

Why does a layer of water-based paint crack?

The reasons for this phenomenon do not differ in originality, and, as a rule, are the same for all coatings; they can be determined by the type of cracks:

The paint cracked in the form of a pattern resembling crocodile skin.

Causes:

  1. Drawing on a layer of an elastic primer, for example, acrylic.
  2. The second layer of the emulsion was applied before the first was dried.
  3. The paint could deteriorate due to the negative influence of external factors: ultraviolet radiation, dampness, high temperature.

A layer of water-based paint cracked over the entire area, after which it began to fly off flakes.

Causes:

  1. Low quality paint, does not have sufficient adhesion.
  2. The water-based paint was applied too thick.
  3. The surface before application of the paint was not prepared properly.
  4. The paint was applied in poor conditions (during rain, snow, at sub-zero temperatures).

The paint layer begins to exfoliate in whole layers.

Causes:

  1. A low-quality paint with poor adhesion was used.
  2. The paint was applied too thick or too thin.
  3. A poorly prepared surface, such as wood, on which no primer is applied.
  4. The painted surface is deformed. For example, a wall sat or cracked, which led to a cracking of the paint layer.
  5. Incorrectly processed seams and cracks that parted with the paint.

Sometimes after painting the wall with water-based paint, stains and spots of different shades may remain.

Causes:

  1. Master poorly squeezed water from the roller before painting.
  2. A water emulsion has a poor density or poor quality paint.
  3. Too wet surface.
  4. The paint was applied in different directions.

In this case, you have to re-paint the surface, applying another layer of paint. In the case of peeling or cracked paint, you will have to remove the material from the damaged areas, in whole or in part, and then repaint them. In severe cases, you will have to repaint the entire wall. If the individual sections of the paint are intact and hold firmly to the surface, they are left, previously sanding the edges with sandpaper.

Watch the video: How to stop water stains from bleeding through paint - How to hide water stains alternative (February 2020).

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