FIELD: construction.
SUBSTANCE: method includes treatment of a microporous perforated moulded article, containing silicic acid, at least with one organosilane. At the same time in the chamber, where the article is located, they supply one or several steam-like organosilanes under conditions of the reaction until the difference of pressures Δp makes 20 mbar. Difference of pressures Δp=p1-p2, where p1 means pressure in the chamber before supply of organosilane, and p2 means pressure in the chamber, when they stop to supply organosilane.
EFFECT: improved water-repellent properties of products by simple and profitable method.
15 cl, 2 ex
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