One-component polyurethane sealant, as a rule, is used when something is needed to fasten, glue, seal metal, ceramics, brick, concrete, etc. The mixture is a high-quality compound with a high degree of resistance to corrosion, and becomes even more durable when exposed to moisture. Often used sealant for a wooden house.
After applying the material to the surface, it can be subjected to various treatments, including painting and varnishing. Polyurethane sealant sticks together surfaces quickly enough. In this regard, work with the material should be carried out taking into account the setting time. It should be noted that the use of the material requires compliance with certain safety rules. Do not allow the mixture to come into contact with exposed skin. Polyurethane sealant is available in sealed packaging. The material should not be stored at elevated temperatures and humidity. On average, the shelf life of an unopened package is about nine months. It is advisable to use the material from the opened package immediately, since the polyurethane sealant is enoughquickly loses its useful properties.
The material is a homogeneous viscous mass formed on the basis of resins. When interacting with moisture contained in the air, the polymerization of the compound occurs.
Features of the use of the material are determined by its operational characteristics. Among the main qualities, it is necessary to note the economy in use, the absence of shrinkage, the manufacturability of application, and the short curing time. Of no small importance are adhesive properties, as well as elasticity, strength, durability, and maintainability. Polyurethane sealant can also be used at sufficiently low temperatures.
The operational properties of the material allow it to be used everywhere. Polyurethane sealant is especially widely used in construction for sealing seams, double-glazed windows, for waterproofing pools, and for roofing. According to the way of use, the material can be produced in two types.
On some surfaces the material is applied as a liquid mastic. At the same time, a highly elastic, durable waterproof membrane is formed on the surface, which is resistant to negative environmental factors: microorganisms, ultraviolet radiation, and others.
A more viscous sealant is used to fill seams, joints, as well as sealing at the joints of certain materials. Often, compounds are also used to join materials that have significant differences inphysical properties.
The main indicator when choosing a sealant is its hardness. Hardness in this case is the ability to resist penetration into the composition of another material. So, a sealant with an indicator of 15 is used to isolate roofing joints, interpanel seams, connecting assemblies of prefabricated structures. A hardness level of 25 allows the material to be used to seal joints that will be exposed to water for an extended period.
