Hidare,,, Did I hear that Kaolin clay was not good for Cob? We have a Kaolin pit close to where I live. And I talked to an Employee of the company today. He said that I could buy it for $15/ton/dumptruck load. And the more I baught the cheaper it would get. Also they process it into a dry powder, and sell it in 50 pound bags. At $6.50/ bag. I wonder if anyone tried the Fugitive Dust from an Asphalt Plant? Thanks,,,Bill