An antimicrobial structure surface therein wherein the structure surface includes an antimicrobial agent having a biocidal metal ion source and compound containing a hydantoin ring wherein the compound containing the hydantoin ring may or may not have antibacterial properties but the combination of the compound containing the hydantoin ring and the biocidal metal ion source when in the presence of a liquid coact to increase the level of available metal ions for killing microorganisms on the structure surface.
