Hot-dip galvanizing provides cathodic protection of metal resistant to corrosion. Zinc layer on the surface is 25-30 microns. In the context of this multilayered sheet resembles a cake at the heart of which is galvanized steel, further passivated layer, the primer, and at the end polymer coating on the front side and a protective paint from the bottom. Polymer coating is a material made from organic polymers (synthetic resins or plastics) with the addition of pigments, additives and solvents (if necessary), forming a coating with protective and decorative properties. Plastisol coating (polyvinyl chloride) is a decorative polymer. In It is composed of polyvinyl chloride and various plasticizers. The thickness of polymer coating for steel sheet roof – 175 or 200 microns.

Manufactured as sheets with 2-sided plastisol coated to 100 microns on each side. Such material, for example, used to make pipes and gutters. Due to the large thickness of Plastisol coating is one of the most resistant to mechanical damage. However, due to its low temperature resistance and low resistance to uv radiation (when heated by direct sunlight more than 800 C the material rapidly aging) is not recommended to use it in the southern regions. Having a greater thickness, plastisol has a high corrosion resistance, which creates additional protection in a polluted environment. Colour fastness to significantly lower polyester (covering a few years evenly lose color brightness). At a thickness of 175 um coating of plastisol is produced only smooth.

And on the cover thickness of 200 microns can be dashed off stamped pattern embossed textured surface rendered (in this case in the stamping ground of the coating layer thickness is much decreases). Steel sheets with a plastisol coating is an ideal material for the manufacture seamed roofs, because the high ductility and large thickness of the coating protects the sheets during the mechanical exposure. Paint coating – coating which is formed by the Square? (dry) coatings, paid? on the surface of products. The main purpose of coatings – Protection materials from demolition (eg, metals – corrosion, wood – from rotting), and decorative trim products. There are also special coatings – electrical, fluorescent, termoindikatornye, heat-resistant, gasoline and oil-resistant and other coatings applied in all sectors of the economy and everyday life. With proper operation of the service life of paint coatings can reach several years, they are not expensive, easy to apply and repair, attach to the surface being protected beautiful appearance. Properties of paint by the composition of coatings (type pl? Nkoobrazuyuschih substances, pigments, etc.), as well as the structure of coatings, which in most cases consist of several layers. The most important requirements for paint coatings – lasting grip (adhesion) of the individual layers to each other, and lower layer – also with the substrate, tv? rdost, bending strength and shock, moisture resistance, weather resistance, a complex decorative properties (transparency or opacity, color, gloss, pattern, etc.). Upon receipt multilayer coatings are used the following materials: a primer that is applied directly onto the substrate for e? corrosion protection and paint adhesion; shpatl? fri, applied the layer of primer, if necessary filling of the pores, small cracks and other defects eliminate surface colors, which give the surface the necessary decorative features and provide durability of paint coating to external influences, varnishes, applied over a layer of paint to increase gloss paint (when transparent lacquer coating varnish is applied directly onto the protected surface). Total thickness of multilayer coatings is typically 40-300 microns Technological process of refinishing includes the operation of surface preparation, coating each layer, drying paint coatings and finishes