FIELD: heat-insulating compositions. SUBSTANCE: heat-insulating material is prepared from a mixture at the following ratio of components, wt.-%: basalt fiber (diameter is 0.2-3.0 mcm) 88.7-98.3; clay binding agent 0.5-7.0; polyvinyl acetate dispersion 1.0-2.3; water-repellent liquid 136-41 0.2-2.0. Properties: density of material is up to 38 kg/m3,, flexibility of coating is up to 12 mm. EFFECT: improved quality and property of material. 1 tbl
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