What is the inconvenience of depressurizing a fireplace or stove?
During the operation of furnaces and fireplaces, defects occur in a certain periodicity in the form of slots and looseness in the masonry of these heating and cooking systems. The presence of such defects affects the efficiency of work, fuel consumption, the occurrence of darkening from soot and soot, not only on the surface of the furnace or fireplace, but also in the premises of their installation.
Additional smoke, traction and fire hazard are also consequences of decompaction of critical joints and furnace units. As a rule, in order to more easily detect the described defects, the furnaces are covered with whitewash.
Materials united under this name are generally designed for operation in conditions of high temperature( up to 1,500 degrees Celsius), have high fire resistance and are suitable for sealing seams in places exposed to high-temperature gases and combustion products. Their external and internal use in heating systems guarantees complete tightness of the treated areas, ensuring the termination of undesirable leaks.
Characteristics and behavior of
furnace sealants Most sealants contain special silicate components and glass fiber reinforcement. Hardening, these sealants constitute a strong seam, designed for long-term operation, reliable occupancy. As a rule, the sealant for furnaces has the value of the operating temperature( its operation) and the temperature at which it can be used during repair work.
The vast majority of stove sealants should be used at positive temperatures. Most manufacturers point out the need to observe a temperature of at least zero degrees Celsius. Of course, the temperature of the joints to be processed should not be lower than the one specified on the package of a particular type.
In addition, these formulations, like other sealants, have a curing time or a polymerization period. As a rule, these values correspond to fresh compositions that are not overdue in storage.
With increasing shelf life, this time increases - the curing rate drops. And the time it can be from a few minutes to a day or more. Of course, this parameter is also affected by the amount of the applied composition and its type( neutral, acidic).
Features of using
furnace sealant There are certain requirements and rules for carrying out work in order to qualitatively use high-temperature sealant for furnaces. All the places on which the application of the composition is intended, must be thoroughly cleaned and degreased. For metal surfaces, use is made of products containing acetone or alcohol. Sealants are used after removing layers of scale or rust to clean metal. It is its surface that is degreased.
For brick surfaces, it is necessary to remove soot and soot to a clean surface and treat it with a degreasing solution( copper sulfate, etc.), after drying for at least half an hour, the surfaces are dried. Packaging for most modern sealers are tubes, for their use you need a mounting gun. With its help, higher accuracy and less consumption of sealant is achieved.
Since different types of sealants form joints with different hardening times, it is recommended to follow the manufacturers instructions. In general, after applying and starting the curing of the composition, it is necessary to gradually warm the oven or fireplace, controlling the polymer hardening process. The temperature increase is carried out gradually and is maintained for several hours, until the process of acquiring the composition of the specified color( for example, very often it is black color) will not end.
Further finishing can be carried out only after the sealant has completely hardened. Compositions can become glassy and un-colorable, or retain sufficient elasticity throughout the stated life time. By the way, the described high-temperature sealants can be used as a sealant for a chimney. They can be used to spread the joints and joints in the places where heated gases enter it.