A professional who tends mixer that makes lute used for sealing oven doors or tap holes in furnaces. Respnsibilities include:

• Shovels specified amounts of materials, such as sand and clay, into mixing pan.
• Turns valve to add water, starts machine, and mixes materials with paddle as pan rotates to obtain specified consistency.
• Shovels lute into transfer truck.
• May be designated according to material mixed as adobe-ball mixer; clay mixer; or machine used as wet-pan mixer.