Scott Bennett from housefish.com writes:
I’ve had a sample of this stuff sitting around on my desk for a few years now, just waiting for the chance to use it. That chance still hasn’t come for me, but maybe you can think of something. Alusion is the trade name for Cymat’s “stabilized aluminum foam” product. The best way to describe it is as a sort of aluminum sponge. Using a patented process, the manufacturers take a molten aluminum metal matrix composite (made from recycled aluminum) and aerate it, then cool it to preserve the bubbly cellular structure. Being mostly air, the finished product weighs almost nothing. It looks like metallic volcanic rock.
The best part — it’s made from post-industrial aluminum and is fully recyclable (except for the resin-encased version).