I've checked out
their website and talked with one of their people. They are sending me
some info. They concede that their current product has little effect on
high-energy gammas, such as from Co-60,
and even less on cosmic rays. But they claim that they will be able to
develop a product that will be effective for such sources and are working on
it.
I am highly
skeptical, but will get back to you after I've read their material and talked
with their technical director, Joe Kucherovski.
Ted
Rockwell