A novel combination of OPA, a surfactant, and alcohol. The surfactant is preferably a dual chain quaternary ammonium compound consisting of a mixture of alkyl dimethylbenzylammonium chlorides and alkyl dimethylethylbenzylammonium, that absorbs onto a surface and alters the free energy of that surface. The alcohol is preferably isopropyl alcohol. The OPA is the dialdehyde C6H4(CHO)2, which produces an inherent bacteriostatic effect and lowers surface tension and thus aids in the spread of the dual quat on the biofilm covered surface where it is readily absorbed by the negative surfaces of proteins and bacteria. It thus serves as a binding agent between the dual quat and the application surface. This multi purpose component helps create the unique aspect of the formulation. The three foregoing constituents are combined in preferred concentrations within acceptable ranges to provide a synergistic formulation that combines biocidal molecules in a biological chemical system that actively transports itself into the cells, through biofilm and cell wall/membranes, thereby overcoming penetration restraints to improve kill and kill time, without the need for activation or any time or temperature control. This is an effective example of synergistic complementarity.