1. A synergistic antimicrobial composition comprising glyphosate and 3-iodo-2-propinilbutilkarbamat.2. The synergistic antimicrobial composition of Claim 1 wherein said glyphosate salt is zinc glifosata.3. The synergistic antimicrobial composition of claim 2, wherein the weight ratio of said 3-iodo-2-propynyl butyl carbamate / zinc salt of said glyphosate is from 0.1: 1 to 10: 1.4. The synergistic antimicrobial composition of claim 2, wherein the weight ratio of said 3-iodo-2-propynyl butyl carbamate / zinc salt of said glyphosate is from 0.2: 1 to 3: 1.5. A method for inhibiting growth of or controlling the growth of microorganisms in a building material, said method comprising the step of adding to said building material synergistic antimicrobial composition according to paragraph 3.6. A coating composition comprising a synergistic antimicrobial composition of p.3.7. Dry film obtained by the method which consists in that the layer of coating composition of claim 6 coated onto a substrate and drying said coating composition or said composition is kept to cover the air for vysushivaniya.8. A process for preparing a zinc salt of glyphosate, which is that carried out the following steps: (a) preparing an aqueous glyphosate solution, (b) mixing said aqueous solution of glyphosate with an aqueous solution of an inorganic zinc salt, wherein said mixing is carried out while maintaining the pH of the mixture is below 6.1. Синергетическая противомикробная композиция, включающая глифосат и 3-иод-2-пропинилбутилкарбамат.2. Синергетическая противомикробная композиция по п.1, где указанным глифосатом является цинковая соль глифосата.3. Синергетическая противомикробная композиция по п.2, где массовое соотношение указанный 3-иод-2-пропинилбутилкарбамат/указанная цинковая соль глифосата составляет от 0,1:1 до 10:1.4. Синергетическая противомикробная композиция по п.2, где указанное массовое соотношение указанный 3-иод-2-пропинилбутилкарбамат/указанная цинковая соль глифосата соста
