An anti-microbial composition comprising: (i) an antimicrobial agent with surfactant properties which is a quaternary ammonium compound having the formula R 1 R 2 R 3 R 4 N + X -, wherein R 1, R 2, R 3 and R 4 represent, independently a substituted or unsubstituted and/or straight chain or branched and/or interrupted or uninterrupted alkyl, aryl, alkylaryl, arylalkyl, cycloalkyl, heterocyclyl or alkenyl group or two or more of R 1, R 2, R 3 and R 4 together with the nitrogen atom form a substituted or unsubstituted heterocyclic ring, and wherein the total number of carbon atoms in the groups R 1, R 2, R 3 and R 4 is at least 4; wherein the substituents for the groups R 1, R 2, R 3 and R 4 are selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, heterocyclyl, substituted heterocyclyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, arylalkyl, substituted arylalkyl, F, Cl, Br, I, -OR', -NR'R", -CF 3, -CN, -NO 2, -C 2 R', -SR', -N 3, -C(=O)NR'R", -NR'C(=O)R", -C(=O)R', -C(=O)OR', -OC(=O)R', -O(CR'R") r C(=O)R', -O(CR'R") r NR"C(=O)R', -O(CR'R") r NR"SO 2 R', -OC(=O)NR'R", -NR'C(=O)OR", -SO 2 R', -SO 2 NR'R", and -NR'SO 2 R"; wherein the substituents in the substituted alkyl, substituted alkenyl, substituted heterocyclyl, substituted cycloalkyl, substituted aryl, substituted alkylaryl and substituted arylalkyl are selected from the group consisting of F, Cl, Br, I, -OR', -NR'R", -CF 3, -CN, -NO 2, -C 2 R', -SR', -N 3, -C(=O)NR'R", -NR'C(=O)R". -C(=O)R', -C(=O)OR', -OC(=O)R', -O(CR'R") r C(=O)R', O(CR'R") r NR"C(=O)R', -O(CR'R") r NR"SO 2 R', -OC(=O)NR'R", -NR'C(=O)OR", -SO 2 R', -SO 2 NR'R", and -NR'SO 2 R"; wherein R' and R" are individually hydrogen, C 1 -C 8 alkyl, cycloalkyl, heterocyclyl, aryl, or arylalkyl, and r is an integer from 1 to 6, or R' and R" together form a cyclic functionality; and wherein X - is halide or sulphonate; (ii) a siloxane selected from those having the formulae (H 3 C)[SiO(CH 3) 2] n Si(CH 3) 3, and (H 3 C)[SiO(CH 3)H] n Si(CH 3) 3, and mixtures thereof, wherein n is from 1 to 8; and (iii) a polar solvent; wherein the ratio of molecules of (i) to molecules of (ii) is from 100:1 to 5:1. (i) an antimicrobial agent with surfactant properties which is a quaternary ammonium compound having the formula R 1 R 2 R 3 R 4 N + X -, wherein R 1, R 2, R 3 and R 4 represent, independently a substituted or unsubstituted and/or straight chain or branched and/or interrupted or uninterrupted alkyl, aryl, alkylaryl, arylalkyl, cycloalkyl, heterocyclyl or alkenyl group or two or more of R 1, R 2, R 3 and R 4 together with the nitrogen atom form a substituted or unsubstituted heterocyclic ring, and wherein the total number of carbon atoms in the groups R 1, R 2, R 3 and R 4 is at least 4; wherein the substituents for the groups R 1, R 2, R 3 and R 4 are selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, heterocyclyl, substituted heterocyclyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, arylalkyl, substituted arylalkyl, F, Cl, Br, I, -OR', -NR'R", -CF 3, -CN, -NO 2, -C 2 R', -SR', -N 3, -C(=O)NR'R", -NR'C(=O)R", -C(=O)R', -C(=O)OR', -OC(=O)R', -O(CR'R") r C(=O)R', -O(CR'R") r NR"C(=O)R', -O(CR'R") r NR"SO 2 R', -OC(=O)NR'R", -NR'C(=O)OR", -SO 2 R', -SO 2 NR'R", and -NR'SO 2 R"; wherein the substituents in the substituted alkyl, substituted alkenyl, substituted heterocyclyl, substituted cycloalkyl, substituted aryl, substituted alkylaryl and substituted arylalkyl are selected from the group consisting of F, Cl, Br, I, -OR', -NR'R", -CF 3, -CN, -NO 2, -C 2 R', -SR', -N 3, -C(=O)NR'R", -NR'C(=O)R". -C(=O)R', -C(=O)OR', -OC(=O)R', -O(CR'R") r C(=O)R', O(CR'R") r NR"C(=O)R', -O(CR'R") r NR"SO 2 R', -OC(=O)NR'R", -NR'C(=O)OR", -SO 2 R', -SO 2 NR'R", and -NR'SO 2 R"; wherein R' and R" are individually hydrogen, C 1 -C 8 alkyl, cycloalkyl, heterocyclyl, aryl, or arylalkyl, and r is an integer from 1 to 6, or R' and R" together form a cyclic functionality; and wherein X - is halide or sulphonate; (ii) a siloxane selected from those having the formulae (H 3 C)[SiO(CH 3) 2] n Si(CH 3) 3, and (H 3 C)[SiO(CH 3)H] n Si(CH 3) 3, and mixtures thereof, wherein n is from 1 to 8; and (iii) a polar solvent; wherein the ratio of molecules of (i) to molecules of (ii) is from 100:1 to 5:1.