摘要：

A foam composition for building purposes, particularly for filling joints or connecting construction parts, contains a foamable aqueous phase and a propellant which foam when sprayed together through a nozzle. The foamable aqueous phase contains at least one organic polymer and inorganic components, which include a silicate chemically dissolved in the aqueous phase, the solution of which is film-forming. The organic polymer is present in the form of a dispersion or aqueous solution and produces a silicate-polymer-foam when foamed together with the silicate solution. The organic polymer is contained at ≧3% by weight, the water-soluble silicate is contained at ≧3% by weight, and the organic polymer and the water-soluble silicate are contained at a weight ratio of 20:1 to 1:20, based in each case on their dry substance in the aqueous phase.

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