As is known, paper and cardboard have the ability to absorb moisture from the environment, and high humidity, as well as other effects, it has a significant impact on their physical and mechanical properties. By increasing the humidity is only 30% loss of physical and mechanical properties of paper and paperboard is on average 70%. In the production of paper and paperboard is required to specify a certain level of hygroscopicity, mold release, chemical, biological and thermal stability. To improve the characteristics of all these promising is the use of protective nanocoating - artificially synthesized polyorganosiloxanes in the form of hydroalcoholic nanodispersions. The structure of nanocomposite agents are oligomeric molecules composed of hydrophobic blocks and special anchor groups. The presence of long and short hydrophobic perfluorinated radicals shields the surface from exposure to moisture, thereby providing a unique protective properties. Adhesion strength nanocoating cardboard fibers due active interaction of anchor groups in the oligomer molecule with the functional groups of cellulose. Thus, coating is achieved resilience and durability. oligomer molecules interact not only with the surface of the fibers, but also with each other to form a reticulated polymeric few nanometers thick structure without preventing the penetration of air. When applying the oligomer molecule means not only interact with the fiber surface, but also with each other to form a reticulated polymeric few nanometers thick structure without preventing the penetration of air.