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Investment Casting Waxes

Investment casting waxes are specially formulated waxes used in the process of investment casting.

Investment casting, also known as precision casting or lost-wax casting, is a manufacturing process that involves using a wax pattern to shape a disposable ceramic mold. The ceramic mold is used to replicate a desired pattern in materials typically made out of common metals such as aluminum, bronze, magnesium, and stainless steel.

The process gets its name from the process of “investing” or surrounding a pattern with refractory materials.

Application of Investment Casting Wax

First, a wax pattern is made in the exact shape of the item to be cast. Then, the wax pattern is coated with a refractory ceramic material. Once the ceramic material hardens, it is turned upside-down and heated until the wax melts and drains out, leaving an expendable investment mold. Molten metal is then poured into the mold and allowed to solidify. The resulting metal casting is broken out of the spent mold.

Investment casting yields accurate results when it comes to the replication of fine details in the items to be produced. It presents a significant cost savings in material, labor, and machining.Parts manufactured with investment casting include turbine blades, medical equipment, firearm components, gears, jewelry, golf club heads, and many other machine components with complex geometry.

It usually takes 7 days to go from a fresh wax pattern to a complete casting. The majority of that time is taken up by creating and drying the ceramic shell mold. Some foundries have quick-dry capabilities to produce castings more quickly.

Sprue Wax

Sprue waxes are red colored, round, solid extrusions used in the wax assembly process as well as sculpture construction applications. They are both pliable and strong, allowing the extrusions to be shaped without fear of cracking or breaking.

Carmel sprue wax is custom-formulated to our strictest specifications for proper burnout. This wax melts at 120°F so that it is quickly eliminated during burnout – injection wax is not trapped in investment cavity but eliminated cleanly.

The injectable feature of our sprue wax is a time-saver. If you often use a complicated tree design, make a mold of it and inject multiples using our sprue wax. Your exact tree system is quickly created every time.

Size: 5/16″ x 24″. Sold by the pound.




Approximate rods per pound:

  • 1/4″ diameter – 15 rods
  • 3/8″ diameter – 10 rods
  • 1/2″ diameter – 8 rods
Carmel Industries