Safadasht City, Qebchaq
Mastic is used to insulate the inside of the duct to cover the seams. The foam in polyurethane sheets oxidizes by reacting with oxygen in the air and after a while appears as airborne particles. Therefore, to prevent this from happening, the joints formed in the polyurethane channel are insulated with mastic. To do this, water-based mastics are used, which do not create an odor due to the heat in the channel in winter, because oil-based mastics from It creates an odor, so it is noteworthy that the use of water-based masitates is approved.
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