A professional who lines ingot mold covers (hot-tops) with firebrick and refractory mortar, using handtools. Responsibilities include:

• Examines cover to determine necessary repairs.
• Pries or chips defective lining from inside of cover, using crowbar, hammer, or pneumatic chisel.
• Cleans covers, using wire brush.
• Mixes specified amount of refractory mortar powder with water and spreads mixture on inside of cover, using trowel.
• Positions firebrick and refractory ring in mortar, using trowel, tamping bar, and wire clamps.
• Mixes specified amounts of molasses and graphite to form base for premixed facing solution and applies base and facing solution to cover, using brush.