A professional who tends agitator tanks, portable mixing machines, and related equipment to produce compounds for coating and waterproofing fabrics. Respnsibilities include:

• Measures and weighs materials, such as oils, pigments, plasticizers, resins, stabilizers, fillers, color concentrate, and water according to formula.
• Trucks drums of ingredients to mixers and dumps them into mixing chamber, using hoist, tilt, or by hand.
• Starts mixer to blend ingredients.
• Drains ingredients into storage tanks, buckets, or drums.
• Scrapes and cleans mixers, using hand scraper and solvents.
• May pump specified amounts of liquid plasticizer into supply containers or mixing chamber, as directed.