I'm just going to order some refractory binder and use the preferred methods of forge construction. Frosty is correct, its way to expensive to "test" in a full forge pour, however it would be nice just to pour it in and let it set around a tube form. I'm fairly confident that i will have enough refractory left over to make a few bricks for testing.
The foam generator build is complete and tested, its working great. jwmelvin - I mix the F.M 160 with water and put in the foam generator. You can make 160gal with just one bottle , that's crazy right. I mixed a test batch and covered the grass in front of my workshop that night, next morning it was still there (although not as thick as the initial spray).
I'll follow-up when i have more to report. This month is going to be crazy for time. Daughter's graduation, house full of guests, land maintenance etc..
D. Lyons