Silver Bullet AM is a shop-applied coating that uses the natural germ-fighting qualities of silver to control bacteria. It has Agion, a silver-based anti-microbial compound that can be applied as a water-based epoxy coating to stainless steel, galvanized steel, aluminum and other substrates. Silver Bullet AM is available in black, clear and white finishes. It suppresses microbial growth and guards against metal corrosion in HVAC ductwork, officials say.

Bio Shield Technologies, P.O. Box 15, Clarks Summit, PA 18411; (717) 489-1728; fax (717) 489-0228; www.bioshieldtech.com.