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Fire Clay - High Temperature Mortar Ingredient


Fire Clay, Fireclay, 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 per 50lb bag of firing clay (also see companies below).

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 or Pottery Supply and they can order a bag of Fire clay for you (w/out shipping charges).

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: 

3 Parts Silica Sand
1 Part Quicklime Hydrated Lime
1 Part Fire Clay
1 Part Portland Cement


How to Make High Temperature Mortar

How to Build a Pizza Oven


Here's a list of VERIFIED Fire Clay distributors, but call PRIOR to arriving.  These are big-boys in the refractory business and primarily sell B2B... so you will need to work around their schedules to pick-up fire clay, fire brick, high-temp mortar, etc.  They do NOT ship single bags (we can do that) - it's not their forte.
Smith–Sharpe Fire Brick Supply
2129 Broadway Street NE
Minneapolis, MN 55413
Alsey Refractories
266 State Route 106 South
Alsey, Illinois 62610
Wesco Refractories
301 S 6th Avenue
Mansfield, TX 76063