Castable Resin burns out cleanly with no ash or residue, capturing your high-resolution prints through investment casting.

Castable Resin is an acrylate photopolymer, which requires a different process from a traditional wax schedule. Instead of melting at low temperatures, Castable Resin transitions to a gas. The recommended burnout schedule is designed and tested to allow Castable Resin to transition into a gas gradually. The slow transition reduces the possibility of the investment cracking due to rapid expansion of the printed part. To fully enable the gas transition, maximize the airflow by adding venting, by active ventilation, or by blowing out molds when possible. Ideally, the thermal expansion of the investment should be well suited to the thermal expansion of your 3D printed material. To transition from primarily a wax-based casting process, adjust the process accordingly to achieve a successful cast.

Castable 3D printing
PropertiesCastable resin
Tensile Strength - Yield18.6 MPa
Flexural Strength25 MPa
Elongation at Break10%


  • Up to 25 micron
  • Burning without ash or residue
  • Suitable for direct investment casting


  • Higher molding temperature
Design tips

Maximum bounding box

145 × 145 × 175 mm

Minimum bounding box

X, Y,Z > 5 mm ( for separated parts)

Minimum embossed detail

0.1 mm high & wide mm thick

Minimum engraved detail

0.1 mm high & wide

Minimum unsupported wall thickness

0.6 mm

A supported wall is connected on two or more sides. An unsupported wall is one connected to other walls on less than two sides. Walls in your model should be thicker than or equal to the minimum measurements suggested to ensure your model makes it through printing and cleaning. Walls that are too thin are prone to warping in the printing processing, or may break when we remove it from the printer and clean it. Walls and wires close to or slightly above the guidelines may still be rejected based on the geometry. For example, extra long wires or walls protruding from an object may be damaged during cleaning. Our production team will communicate with you if the design is too weak with tips on how to strengthen it.

Minimum supported wall thickness

0.3 mm

Minimum supported feature size

0.6 mm

Minimum unsupported feature size

1 mm

A geometry considered a wire when its thinner in both unconnected directions than its length. When a geometry is thicker than 0.9 mm in one direction, it will fall under the wall guidelines. Wires that are under our suggested minimums are prone to breaking in the cleaning process, or warping.

Escape hole diameter

Single Escape Hole Diameter
4.0 mm
Multiple Escape Hole Diameter
2.0 mm

Hollow parts of your product are filled in with a waxy support material, which is melted out before we ship your product. If escape holes are not large enough, this wax will remain inside the product.

A single escape hole at the end of a cavity will not allow material in the corners near the escape hole to fully escape. So we recommend multiple escape holes at both ends of the cavity.

Clearance between parts

0.05 mm

Clearance is the space between an two parts, e.g. space between gears or a ball and socket joint.