1. Introduction
As a rule, lime compositions are used for historical buildings restorations. Given that lime compositions are characterized by slow curing periods and have insufficient water resistance, the use of nanosized additives – synthesized hydrosilicates, aluminum silicates, silica sol, organo-mineral additive (Loganina et al., 2014a,b,2015a,b) – is suggested. The research shows that such synthesized additives combined with lime based finishing compounds increase water- and frost-resistance of finishing coatings.