I use a layer of mizzou castable about 3/8" thick on the floor of my forges. Very strong and holds up real well to borax. Bubble alumina will work too but is more expensive than the mizzou. I get my refractories in small quantities from Darren Ellis. Just smear it on the kaowool and feather the edges if you want. Be sure to coat all the exposed wool with satanite or ITC-100 to keep the fibers from floating around and getting in your lungs.
Ken |