It won't go anywhere here - maybe Japan. FCC has ruled in the past it is illegal to ban these transmissions.
Active jammers are illegal in the US, but passive jamming is OK.
What the paint does is similar to what older houses already do to radio signals.
Its illegal to JAM the signals. Jamming is active transmission of noise on the same frequency to stop cell phones from functioning.
This technology is a passive technology, and doesnt transmit anything.
IMO, since it doesnt transmit, it doesnt even fall under the jurisdiction of the FCC.
Otherwise, the FCC could come down hard on buildings with thick concrete walls (that block cell and other signals)
It may be illegal to jam radio transmissions, but it's certainly not illegal to simplyfilter them out.
Jamming involves a competing broadcast; this paint would simply not allow the signals to penetrate.
There is a difference; I know it's a subtle one...
"Passive" blocking such as putting a lot of metal in the walls would be ok. "Active" blocking i.e. jamming is what the FCC prohibits.
The description here is pretty vague so I don't know which kind they're talking about.