Wi-fi Blocking Paint
I wrote about this in 2004. This is an improved product:
While paints blocking lower frequencies have been available for some time, Mr Ohkoshi’s technology is the first to absorb frequencies transmitting at 100GHz (gigahertz). Signals carrying a larger amount of data—such as wireless internet—travel at a higher frequency than, for example, FM radio.
Matt Simmons • October 12, 2009 2:15 PM
Ah, yes. Faraday Cage in a can. Combine this with a can of magnetic white-board paint, and we’ve got ourselves a good time!