FIELD: construction.
SUBSTANCE: invention may be used in construction to fill cavities in construction structures of buildings and works to limit flame spreading and also for heat and sound insulation. In the method for sealing of cavities in construction structures of buildings and works, including preparation and supply of a sealing mix into cavities, containing liquid glass and silicon of 100 mcm fraction, the specified supply is carried out in portions, besides, activation is carried out by portions of the prepared sealing mix maintained until start of reaction between liquid glass and silicon, using for activation in each portion the additive from the previous portion in the amount that regulates time of its hardening and making 5-40%.
EFFECT: improved fire safety.
8 ex, 1 tbl
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