Sometimes there is a need for protection fromcorrosion of waterproofing of mobile concrete structures, which are difficult to operate. In this case, a traditional polyurethane mastic can be used. Having familiarized yourself with the assortment of modern building materials, you can pay attention to the products of the brand "Hyperdesmo", which is offered in banks of different volumes. It is noteworthy that this composition can have different colors, namely: red, gray, white, green or dark brown. When ordering for this, you should pay attention to create an aesthetic layer on the surface.
Description
The above waterproofing materialprovides excellent protection against various moving concrete structures from corrosion. The application can be carried out on the elements of balconies, pools, reservoirs, terraces, stadiums and roofs. Mastic can be used to create a waterproofing layer, as well as a protective coating from moisture.
Feedback on benefits
The described polyurethane mastic is veryis popular among consumers for the reason that it is able to transform into an elastic membrane when a one-component element interacts with air. According to users, it perfectly interlocks with all kinds of surfaces, which simplifies the work. The composition is characterized by high resistance to oils, salts, alkalis, acids, ozone, ultraviolet, microorganisms and gasoline.
Users like that the mastic retainsits properties even when conditions change, for example, when the temperature falls below the zero mark. Polyurethane waterproofing mastic is resistant to abrasion and does not release hazardous substances for human health. It is universal, as users emphasize, and it can be used for internal and external works.
Surface Preparation Tips
Before using one-component masticsit is necessary to get acquainted with the advice of specialists in laying the material on the surface. The base must be prepared in advance. The coating should not leave traces of cement milk, dust or oils. It is important to take into account a variety of rough coat and, if necessary, use a primer. Polyurethane mastic should only be applied after surface treatment with a sealant if there are cracks larger than 1 mm, corner joints or expansion joints on the base. All such errors can easily be fixed independently. The application of the product is unacceptable on weak surfaces, it is necessary to refrain from applying if the strength of the concrete to be coated is less than 20 MPa. When carrying out work on the internal waterproofing of underground structures, it is first necessary to make a good waterproofing.
Specifications
Polyurethane mastic has certain technical characteristics, including a 95% dry residue, and a density ranging from 1.3 to 1.4 g / cm3. It is important to take into account that at 20 ° C the composition preservesviscosity from 4.5 to 7.5 mPa.s. The film at a temperature of +25 ° C and a humidity of 55% is formed after 6 hours, while the application of the second layer should be carried out after the polymerization step. It takes from 6 hours to a day. As for the period of complete polymerization, it will occur after 7 days. Polyurethane mastic "Hyperdesmo", reviewed in this article, can be used for a wide range of temperatures, which varies from -50 to +90 ° C. On the surface of the composition after hardening, a short exposure to elevated temperature is possible for 3 minutes. In this case, the increase can reach +250 ° C. For professionals and private consumers such parameter as the expense of the means which makes 1,3 kg / m is important2.
Features of application
After a thorough preparation of the surface,start to apply mastic. The first step is to mix it. For this purpose, it is best to use a spiral agitator, whose diameter is 140 mm. Polyurethane waterproofing mastic "Hyperdesmo" can be mixed with a construction drill, and it must be set at 200 rpm. Stirring should last approximately 4 minutes. If the application is done manually, then it is best to use a large paint brush, it should have a short stiff bristle. Some prefer a roller, but it should have a short pile. Specialists use a mechanized application, an airless spraying device that is designed to work with similar substances having a high viscosity can be used.
Recommendations of a specialist
If the work is done in the summer, then this iswill occur in about 8 hours. Durable coating will be in 7 days. It is important to exclude excessive application of mastic. For each layer should be spent approximately 0.7 kg. If you allow an excess, this can cause bubbles on the ground. It is important to observe the technology when using polyurethane mastic "Hyperdesmo". Hyperdesmo (25 kg) can be supplemented with reinforced polymer mesh or fiberglass. Applying the premise of dry quartz sand, it is possible to significantly increase the wear resistance of the coating.
Conclusion
При низкой температуре окружающей среды мастика can thicken, it will complicate the work of the master. In order to exclude such phenomena, it is necessary to try to keep the temperature in the room from +15 to +30 ° C before starting work. If necessary, 10% of xylene or toluene may be added to the ingredients of the formulation. If other solvents are used, the substance, quite possibly, will simply cease to solidify.
After completion of the application phase,to carry out the cleaning of equipment, it is necessary to perform these works with the help of acetone or xylene. The surface hardening will depend on the temperature of the outside air, as well as the humidity. If the thermometer's column has dropped quite low, the polymerization will proceed slowly.
