FIELD: insulation materials. SUBSTANCE: invention relates to stable foamed disperse systems, which can be used for manufacturing porous products based on clays, cement, and gypsum. Foaming agent includes 1.3-2.0% soap, 75.0-83.3% liquid glass (stabilizer), and 15.4-23.0% water, said soap being sulfate-based one and said liquid glass prepared from microsilica by directly dissolving it in one step in alkali solutions at atmospheric pressure and temperatures up to 100 C during 40 to 120 min. EFFECT: reduced production expenses. 2 tbl
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