Pure Fire Clay, Mortar Clay and/or Bricklayers Clay is an organic material that has been dried and turned into a powder form. It is usually a brackish red / brown in color or it could be white / grey. The texture is like baking flour or baking soda. These powdered clays can be found at most Masonry and Landscape Supply Stores for about $10 - $15 per 50lb bag of firing clay. You may find a bag of fire clay at a Big Box hardware store like Home Depot, Lowes or Menards - but it’s unlikely.
If you can’t find a bag near you, check with your local Ceramic Supply and they can order a bag of Fire clay for you. If all else fails, we can always ship you a bag of Fire Clay - We've got plenty in stock! But keep in mind - FedEx Ground is expensive, so we begrudgingly have to add that to the cost of the fire clay...
High-Temperature Mortar Mix Recipe: