Within ancient times, the use of sealants had begun. The development polymeric adhesives and products began along with the polymer sector, that is, in early 90’s.
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To seal off joints, joint sealants are used. It was also used to seal joints plus openings between two or more substrates. They are believed to be a critical component for building design and construction. In components that are heat conductors, hot insulation material can be found such as aluminum evade, whereas cold insulation material simply cannot.
For a variety of applications; commercial and residential, sealants are used quite commonly. Common sealants include butyl, silicone, urethane, acrylic, and other types of polymers. The hot and cold insulation material seems good, and the history of these materials is interesting and deserves a word of appreciation.
In every aspect of life, in daily purpose also, for achieving powerful joints, the basic rules and practices have been well established. The principal exterior substrates that are sealed in joint sealants are Exterior wall joints (e. g. masonry, concrete, plaster/stucco, EIFS), Concrete paving joints, Seismic movement joints and the interior substrates that are sealed are plaster, gypsum board, kitchen and bathroom wet joints. Joints in these are usually sealed up to keep dirt out and make them look better. The application areas where we use hot and cold insulation material are Food Processing, Dryer Turbines, Annealing Furnaces, Deep Freezers, False Ceiling and Pipelines.
While selecting these materials typical considerations exist:
᾿ Joint Design: The design specifics of a joint must correspond having a sealant’s capability of movement for the mounted conditions.
᾿ Durability Properties: Typically the service life of the installed one can be remarkably influenced by adhesion of a sealant to a specific substrate and its getting older characteristics. This is because they relate to capacity moisture, ultra-violet radiation, bio destruction, temperature, movement during curing, and so on
᾿ Physical and Chemical Attributes: Performance of a joint is inspired by properties of the sealant including modulus of elasticity, fatigue weight, its stress/strain recovery characteristics, and many other factors.
Common Problems & avoidance
So we can have the opinion that most of these materials used in daily factors brings great benefit to the person but some problems occur during the use that should be taken care of, so we need to avoid them like choose a product that could withstand the movement expected, indicate the scope of product function completely, estimate the actual amount of activity correctly, considering the width of the joints, the distance between joints, and the thermal range, and specify its execution correctly.
Thus we can claim, these materials have great advantage in both commercial and residential areas, UV curable materials are developed to take favor of their elimination of blending and heat curing, ease of program, and elimination of liquid solvent.