I was thinking that I bought the kit at Amazon but I might have just bought it straight from their web site.
http://www.shineseal.com/products.htm
I got the master kit and did 6 wheels with it, front and back sides.
I just spent ALL DAY autocrossing at a school...in the rain. When I got home there was a puddle of brake dust \ rain at the bottoms of my wheels. I took a rag and wiped them dry, they look just as good as they did yesterday when I snapped those pics.