Kaolin is readily available and inexpensive at my local farm supply store. It appears to be chemically equivalent to fireclay (aluminum silicate) and is the primary ingredient for porcelin. Could kaolin be substituted for fireclay in the mortar mix. I've used kaolin as a pond sealer - get it wet and it sure is gooey stuff. Should make a very smooth high temp mortar??
Login or Sign Up
- Log in with