I am always skeptical about products that claim to be antibacterial because even though they may have antimicrobial compounds in them, their efficacy is often questionable. Mainly, because their shelf life is limited and no one has really proved how these compounds get out to fight the microbes. However, this is an interesting paper on a new kind of emulsion for use in antibacterial paint. The author says the paint is effective for one year. Not sure when this product will hit the shelves but it will probably take many years as do most things of this nature.