In Yerevan, cold bitumen mastics are used as a roofing layer, prepared from a mixture of bitumen pasta and mineral filler, which uses cement. To protect the layer of mastic from destruction, it is painted with a composition of LEBT, which is a mobile mass of cream -shaped consistency, consisting of ethylene varnish (31%), bitumen (4%) and pigmenting and plasticizing tuff powder (65%). This composition is applied with a brush in the same way painting with oil paint. When examining combined coatings with a roof of mastic painted with the composition of the LEBT, in some cases there was an insufficient durability of the film.
The same way painting
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