InformationWeek's W. David Gardner today looks at EM-SEC Technologies' new RF-blocking paint, intended to "protect in-building wireless data from unauthorized incursions."

"EM-SEC Technologies said its EM-SEC Coating is a specially designed surface coating that has been successfully tested, proven and used by different U.S. defense and intelligence agencies," Gardner writes. "The firm is now moving to market the paint for commercial use."

"When wireless signals hit our painted walls, they are reflected back," says company vice president of sales and marketing Pete Hernandez. "You can brush it, roll it, or spray it and it dries in a few hours. When it's applied over a weekend, the only way you'd know about it, is your cell phone won't work."

EM-SEC's press release is here.