Abstract: Method for obtaining the foamed organosilicon compositions, involving mixing of organosiloxane rubber (OR), organosilicon joining agent (JA) and modifier (M). Agents acting like (OR) are represented by polyorganosiloxane block-copolymers having formula as follows: {[R1SiO1.5]a[R2(OH)SiO]b, [R3R4SiO]c}n, where: R1R2R3R4 are aliphatic, aromatic radicals having from 1 to 6 atoms carbon; n is an integer from 30 to 360; c=1; a is selected from the 0.019-3.760 interval; b is selected from the 0.008-0.240 interval; or the mixture of the above block-copolymer with the “&agr;”, “&ohgr;”-dihydroxypolydiorganosiloxane in the ratio of (0.05-0.

Abstract: Method for obtaining the foamed organosilicon compositions, involving mixing of organosiloxane rubber (OR), organosilicon joining (JA) and modifier (M). Agents acting like (OR) are represented by polyorganosiloxane block-copolymers having formula as follows: {?R.sup.1 SiO.sub.1.5 !.sub.a ?R.sup.2 (OH)SiO!.sub.b, ?R.sup.3 R.sup.4 SiO!.sub.c }.sub.n, where: R.sup.1 R.sup.2 R.sup.3 R.sup.4 are aliphatic, aromatic radicals having from 1 to 6 atoms carbon; n is an integer from 30 to 360; c=1; a is selected from the 0.019-3.760 interval; b is selected from the 0.008-0.240 interval; or the mixture of the above block-copolymer with the ".alpha.", ".omega."-dihydroxypolydiorganosiloxane in the ratio of (0.05-0.5): 1, respectively; while the individual compositions or mixtures of polyorganohydridesiloxanes act as (JA), having general formula as follows: R.sub.3 SiO?R.sup.1 (H)SiO!.sub.m --?R.sub.2 SiO!.sub.n SiR.sub.3 or at least one substance from the compositions having general formula as follows: RSiX.sub.