FIELD: chemical industry. SUBSTANCE: described is composition for making fire-obstructing material. Said composition comprises novolac-type phenol-formaldehyde resin, urotropin, butadiene-nitrile rubber and fibrous carbon material. Composition further comprises ethyl silicate, ratios of components being as follows, wt parts: novolac type phenol-formaldehyde resin, 7.5-42; urotropin, 0.8- 4.8; fibrous carbon material, 25-75; butadiene-nitrile rubber, 0.75-30; ethyl silicate, 2-15. EFFECT: manufacture of semiproducts having improved mechanical properties of lower fume evolution during service life. 2 ex, 2 tbl
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