Formlabs Castable Wax Resin is a specialized castable SLA resin developed for highly accurate lost-wax casting applications. The material contains approximately 20% wax and is engineered to produce intricate geometries, sharp details, and smooth surfaces while delivering an exceptionally clean burnout process.

This resin is specifically designed for industries where precision, fine detail, and casting quality are critical, including:

• jewelry manufacturing
• dental applications
• industrial precision casting
• luxury products
• miniatures and decorative objects
• engineering castings

Within the Formlabs ecosystem, Castable Wax Resin is considered a premium solution for professionals who want to move directly from digital design to cast-ready printed patterns without traditional manual wax carving.

What Makes Castable Wax Resin Unique?

1. High Wax Content – 20%

The key differentiator of this resin is its high wax concentration.

Because of the wax component, the material behaves much more like traditional casting wax during burnout compared to standard photopolymer castable resins.

Benefits include:

• cleaner burnout
• minimal ash residue
• reduced risk of inclusions
• improved surface finish on metal castings
• higher reliability for delicate structures

This makes the resin ideal for:

• delicate jewelry
• filigree designs
• micro-details
• complex internal structures

2. Exceptional Detail Resolution

Castable Wax Resin was engineered for applications where micron-level precision is essential.

The resin produces:

• ultra-fine engravings
• sharp edges
• smooth surfaces
• tiny readable text
• complex geometries
• highly accurate stone settings

For jewelers, this means highly complex designs can be printed directly with minimal manual finishing.

3. Clean and Reliable Burnout

One of the main challenges with castable 3D printing resins is residue-free burnout.

Formlabs optimized Castable Wax Resin to:

• leave extremely low ash content
• burn out in a controlled manner
• work with standard investment materials
• reduce mold cracking risks

This is essential for high-quality casting in:

• gold
• silver
• platinum
• other precious metals

Mechanical and Processing Characteristics

Although Castable Wax Resin is not intended as a functional end-use material, its processing characteristics are extremely important.

Key Characteristics

High Rigidity

Printed parts maintain:

• dimensional stability
• delicate structures
• precise fine details

Smooth Surface Finish

The SLA process provides:

• minimal visible layer lines
• extremely smooth surfaces
• reduced polishing after casting

Dimensional Accuracy

High precision ensures:

• accurate fitment
• reliable stone placement
• repeatable casting quality

Typical Applications

1. Jewelry Industry

This is the primary application for Castable Wax Resin.

Perfect for:

• rings
• pendants
• earrings
• bracelets
• filigree jewelry
• custom luxury jewelry
• highly organic shapes

The combination of ultra-high detail and clean burnout makes this resin especially popular among professional jewelers and goldsmiths.

2. Dental Industry

The resin is also suitable for:

• castable dental models
• partial denture frameworks
• crowns
• bridge structures

Its accuracy ensures precise fitting dental components.

3. Industrial Precision Casting

For technical industries, Castable Wax Resin can be used for:

• micro-components
• technical castings
• decorative metal parts
• prototype metal casting

Workflow: From Printing to Casting

Step 1 – 3D Printing

Parts are printed on compatible Formlabs SLA printers.

The resin is optimized for:

• stable print quality
• high-resolution production
• reliable print consistency
• precise support structures

Step 2 – Washing

After printing, parts are washed in IPA or compatible solvents to remove uncured resin.

Proper washing is critical to:

• avoid surface residue
• ensure clean burnout
• preserve fine details

Step 3 – Post-Curing

Depending on the application, limited curing may be applied.

Over-curing is generally avoided because it may negatively affect burnout performance.

Step 4 – Investing

The printed pattern is embedded into investment material, similar to traditional lost-wax casting workflows.

Step 5 – Burnout

During burnout:

• the wax melts away
• the resin burns out gradually
• minimal ash remains

This creates a highly accurate mold cavity for metal casting.

Step 6 – Casting

Compatible with various metals, including:

• gold
• silver
• platinum
• brass
• bronze
• other casting alloys

Surface Quality of Final Castings

One of the major strengths of Castable Wax Resin is the exceptional surface quality of the resulting metal parts.

Benefits include:

• less post-processing
• reduced polishing time
• sharper details
• improved production efficiency

For jewelry businesses, this means:

• lower labor costs
• faster delivery times
• improved consistency

Printer Compatibility

Castable Wax Resin is compatible with several Formlabs SLA printers, including:

• Form 3
• Form 3+
• Form 3B
• Form 4
• Form 4B

Using the correct resin tank and validated settings remains important for optimal results.

Main Advantages

Key Strengths

• 20% wax content
• exceptionally clean burnout
• minimal ash residue
• ultra-high detail quality
• excellent surface finish
• high dimensional accuracy
• suitable for intricate geometries
• reliable casting performance
• compatible with standard casting workflows

Limitations

Like all specialized castable materials, Castable Wax Resin has some limitations.

Less Suitable For

• functional mechanical parts
• impact-resistant applications
• prolonged UV exposure
• structural engineering applications
• flexible components

Successful casting also requires:

• proper burnout cycles
• suitable investment materials
• casting expertise

Professional Workflow Positioning

Castable Wax Resin is not a standard prototyping resin but a specialized production material for businesses producing:

• high-end jewelry
• complex metal castings
• precision metal components
• digitally manufactured luxury products

The combination of:

• SLA precision
• wax-like burnout behavior
• exceptional detail resolution
• professional casting reliability

makes Formlabs Castable Wax Resin one of the leading solutions for digital lost-wax casting workflows.