Zinc omadine, also known as zinc pyrithione, is an antimicrobial agent commonly used in coatings and construction materials to prevent microbial growth like fungi, bacteria, and algae. It's a broad-spectrum biocidal agent effective against a wide range of microorganisms. Zinc omadine is added to paints and coatings to inhibit the growth of mildew, algae, and other fungi on surfaces. Its low water solubility makes it suitable for outdoor applications.