Cracks may appear as a result of contact of different materials, temperature component, various deformations, and so on. In order to initially prevent the appearance of cracks, it is necessary to use unsaturation putty mixtures. They can be on polymer, gypsum material.
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Serious cracks can be eliminated using a plaster or putty layer. In such cases, masking nets are used in size 2×2 millimeters. The main condition for such reinforcement is that the mesh cannot be deepened into the mixture, it is better if it lies on the surface of the mixture. But the net can not help in all cases. She copes well with her task of stretching stress.
Cracks in drywall first need to be deepened with a knife, and then you can apply a primer of deeper penetration. She must dry within 12 hours. After that, you can start using acrylic silicone, which is applied to a crack using a spatula.
If the cracks were formed on the crap, then at the site of the crack you need to remove the small section of the already applied putty. After that, apply a primer and then put down again.