For steel roofing applied The following types of polymers, acrylic, polyester, brushed polyester, plastisol, polyester mat, pural (PURAL), prism, PVDF. Acrylic paint is a layer that is extremely unstable, it is easy damage during installation of the roof. It has a heat resistance up to +120 C, but fade in the sun for 5 years, also has high resistance to corrosion, and after 2-3 years of operation begins peel. Layer thickness 25 microns. Minimum processing temperature-10C. Foreign companies refused to use it since 1997. Online there are only domestic materials with such a coating, but they should only be used for temporary structures.
Polyester is one of the most common polymer coatings on the market for galvanized steel sheet. This is a relatively inexpensive material that is suitable for all climatic zones. Polyester is resistant to mechanical and atmospheric influences. However, the coating thickness is 25-30 microns, and thus resistance to mechanical stress is low. More resistant to mechanical stress polyester with grit silica sand, but it is considerably more expensive. Polyester has a high color stability and plasticity. Resistance to heat – about 120 C. Use of polyester coatings for galvanized steel sheet is a reasonable and economically advantageous when the building is not in a very polluted environment, and operational load is too high.
Matte polyester – is one form of conventional polyester-modified Teflon. Has a warm matte surface. Plastisol – a decorative polymer consisting of PVC and plasticizers. The surface has a textured pattern. The thickness of the coating to a roofing sheet metal is usually sostovlyaet 200 microns.