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Designed specifically for lost wax casting applications and to be used by any 3D printer.

PolyCast is a filament developed by the internationally known filament manufacturer Polymaker. PolyCast is designed specifically for lost wax casting applications and to be used by any 3D printer FFF / FDM on the market, since it has printing parameters similar to PLA.

Pieces manufactured thanks to PolyCast

Image 1:Pieces manufactured thanks to PolyCast. Source: Polymaker

The lost wax casting is used to produce metal parts with high dimensional accuracy and excellent surface finish. In this type of manufacture different metals and alloys are used, such as steel, stainless steel, aluminum alloys, bronze and many more. The conventional processes of the lost wax casting use patterns of molded wax by injection, being necessary for it, machinery and very expensive time intervals, especially for series of production of little volume. For this reason, the part of the industry that is dedicated to the foundry is betting more and more on 3D printing to produce the patterns. In addition, this technology provides greater design freedom because, 3D printing allows complex geometric shapes, much higher than the injection molding process.

Video 2: Lost wax casting with PolyCast. Source: Polymaker

All of the above mentioned results in a drastic reduction of the cost and time of creation of the patterns for the casting by lost wax. The manufacture of molds in a traditional way takes 2-4 weeks and a high cost (thousands of euros). On the other hand, with the use of PolyCast and a 3D printer FFF / FDM the manufacturing time is reduced to 2-3 days, with an extremely lower cost and patterns with much more complex geometries.

Comparison between cost by traditional method and PolyCast

Image 3: Comparison between cost by traditional method and PolyCast. Source: Polymaker

The two most important features of PolyCast are:

Great surface finish: PolyCast can be post-processed with PolySher (through Polymaker's patented Micro-Droplet Polishing technology), this machine achieves a smooth and shiny finish of each piece made with this filament or a PVB filament, in a short time interval and in a very simple way. This great surface finish is essential to guarantee the quality of the final metal parts.


Image 4: PolySher. Source: Polymaker

Burned clean, without ashes: To avoid defects in the pieces made with casting by lost wax, it is necessary that the pattern be completely decomposed. For this reason, Polymaker has invested all its knowledge to get a filament that leaves no residue and that decomposes completely from 600 ºC, leaving the mold clean and ready for casting.

Manufacturing steps

Image 5: Manufacturing steps. Source: Polymaker

In summary, the PolyCast filament is the solution to make castings by lost wax in the fastest and most economical way, especially for making short series or pieces with complex geometries. Apart from this filament there is another material with the same properties, but for 3D printer SLA, Castable Resin for Form 2.

Impact strength (KJ/m2) 9.6
Elongation at break (%) 5.8
Tensile strength (MPa) 35.7
Tensile modulus (MPa) 1745
Flexural strength (MPa) 60.2
Flexural modulus (MPa) 1198
Softening temperature (ºC) 67
Hide color variations (Hide color variations)

PolyCast can be printed under conditions similar to a PLA (extruder temperature: 200 - 230 ºC, base temperature: 30 -70 ºC). The pieces made with this filament are recommended to submit them to a post-processing using the PolySher and thus achieve a completely smooth surface finish. To ensure adherence to the base, it is necessary to use a hot base (30 - 70 ºC), BuildTakBlue Tape or Magigoo PA (PVA glue).

Like many other filaments, PolyCast is sensitive to moisture, so it is recommended to store this material in a vacuum sealed filament package. In case the filament has a humidity value higher than 20%, a filament dryer should be used to eliminate excess water, avoid failures during 3D printing and irregularities in the final metal parts.

General information
Manufacturer Polymaker (Europe)
Material Polycast
Format Spool of 750g or 3000g
Density 1.1 g/cm3
Diameter of filament 1.75 or 2.85 mm
Diameter tolerance ±0,05 mm
Filament length ±283 m (Ø 1.75 mm)
±107 m (Ø 2.85 mm)
±1133 m (Ø 1.75 mm 3000 g)
±427 m (Ø 2.85 mm 3000 g)
Color Natural
RAL/Pantone -
Print settings
Printing temperature 190-230ºC
Print bed temperature 30-70ºC
Chamber temperature Not necessary
Cooling fan Recommended
Recommended printing speed 30-40 mm/s
Raft separation 0.10 - 0.14 mm
Retraction 1 - 3 mm
Retraction speed 30-40 mm/s
Threshold overhang angle 60º
Recommended support material SU301 or Mowiflex
Mechanical properties
Izod impact strength -
Charpy impact strength (ASTM D256) 9.6 kJ/m2
Elongation at break (ASTM D638) 5.8%
Tensile strength (ASTM D638) 35.7 MPa
Tensile Modulus (ASTM D638) 1745 MPa
Flexural strength (ASTMD790) 60.2 MPa
Flexural modulus (ASTMD790) 1198 MPa
Surface hardness  -
Thermal properties
Softening temperature (ASTM D1525 ) 67 ºC
Melting temperature -
Specific properties
Transparency  Opaque
Additional Information
HS Code 3916.9
Diameter coil (outer) 200mm
Diameter coil (inner hole) 53mm
Coil Width 46mm

* The typical values detailed in this table should be considered as a reference. Actual values may vary depending on the 3D printer model used, part design and printing conditions. We recommend confirming the results and final properties with own tests. For more information you should consult the technical data sheet of the product.


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