The present invention relates to a water-in-oil-in-water (W1/O/W2) double emulsion comprising: (a) an internal water phase (W1) comprising: (a1) one or more non-volatile biocide active ingredient (a2) one or more lipophilic surfactants and (a3) water (b) an intermediate oily phase (O) between the internal water phase and the external water phase comprising one or more oil compounds and (c) an external water phase (W2) comprising: (c1) one or more volatile biocide active ingredient (c2) one or more hydrophilic surfactants and (c3) water.