PURPOSE: The titled composition, containing a specific organopolysiloxane and an alkali metallic compound in a specific proportion, capable of completely preventing the sticking of frozen water to the surface of a body, and effective for preventing the danger of the icing on ships or aircraft.

CONSTITUTION: A composition prepared by incorporating (A) 70W99.8wt% organopolysiloxane expressed by formula I (R is monofunctional organic group bonded to the silicon atom through a carbon-silicon bond, preferably 1W6C lower alkyl or H; R' is H, 1W20C alkyl, acyl, aryl or oxime residue; n<4; m<4; n+m<4) with (b) 0.2W30wt% alkali metallic compound expressed by formula II{M is alkali metal selected from Li, Na and K; X is inorganic acid radical, e.g. F, Cl or NO3, etc., OH, organic acid radical, e.g. HCOO or a saturated monocarboxylic acid radical of formula III [(n is an integer 0W20); a is an integer 1W4]}. A lithium compound, e.g. lithium acetate is preferred for the component (B).