I got mine at Home Depot, paint department (you have to know to go t the paint department!). It is hygroscopic, meaning it will suck water out of the air and ruin it, so I have mine sealed in big ziplock bags with Silica Gel.
45 posted on 08/18/2011 6:30:24 PM PDT by Cyber Liberty
(Rick Perry: Looks like Joe Isuzu, acts like Grant Woods [AZ joke])