15 Vacuum Casting Manufacturers Worldwide: A Buyer’s Guide
Finding the right vacuum casting manufacturer is about more than obtaining the lowest unit price. Master-pattern quality, silicone mold design, resin selection, dimensional control and finishing all affect whether a prototype accurately represents your intended product.
This editorial shortlist compares 15 manufacturing providers and sourcing platforms serving international product development teams. Use it to identify suitable suppliers for urethane casting, silicone molding and low-volume plastic parts.
1. Vacuum Casting Manufacturers at a Glance
| # | Company | Base / reach | Primary fit |
|---|---|---|---|
| 1 | Materialise | Belgium | Specialized polyurethane casting and finishing |
| 2 | Xometry | United States / Europe | Digital manufacturing network and vacuum casting |
| 3 | Senses Mold | China | Custom vacuum casting and prototype development |
| 4 | ARRK | Japan / global | Engineering prototypes and large vacuum castings |
| 5 | RapidDirect | China | Vacuum casting with online manufacturing workflow |
| 6 | HLH Rapid | China | In-house prototyping and vacuum casting |
| 7 | WayKen | China | Appearance prototypes and urethane casting |
| 8 | Star Rapid | China | Prototype and low-volume manufacturing services |
| 9 | 3ERP | China | Silicone-mold polyurethane prototype batches |
| 10 | Prototype Projects | United Kingdom | In-house SLA master patterns and vacuum casting |
| 11 | FacFox | China / international service | Online prototyping and urethane casting |
| 12 | RPWORLD | China | Rapid prototyping and low-volume custom parts |
| 13 | Fictiv | United States / global network | Digital custom manufacturing procurement |
| 14 | Protolabs | United States / Europe | Digital prototyping and manufacturing network |
| 15 | Protolabs Network | Global / Europe | Distributed manufacturing sourcing |
2. Detailed Manufacturer Profiles
These profiles focus on practical sourcing suitability rather than unsupported claims about worldwide market share.
1. Materialise — Specialized polyurethane casting and finishing
Materialise offers a dedicated vacuum casting service with rigid, rubber-like and PP/PE-like resins, supporting prototypes and short-series parts.
- Broad resin selection
- detailed technical guidance
- specialist finishing
Buyer consideration: Confirm resin data, part dimensions and documentation requirements.
Official website / service reference ↗2. Xometry — Digital manufacturing network and vacuum casting
Xometry connects buyers with manufacturing capacity for vacuum cast polyurethane parts, including clear, rigid and flexible components.
- Digital RFQ workflow
- multiple material choices
- network sourcing
Buyer consideration: Clarify the manufacturing site, inspection plan and mold replacement terms.
Official website / service reference ↗3. Senses Mold — Custom vacuum casting and prototype development
Senses Mold provides a vacuum casting service for custom plastic prototypes and low-volume parts. The service can be considered alongside other prototyping and molding processes when planning a product development program.
- Project-specific engineering review
- custom parts
- coordination with prototyping requirements
Buyer consideration: Request confirmation of material grades, mold life, tolerances, lead time and finishing options for your CAD design.
Official website / service reference ↗4. ARRK — Engineering prototypes and large vacuum castings
ARRK provides vacuum casting within a wider prototyping and low-volume manufacturing portfolio, with facilities serving international product development teams.
- Complex parts
- finishing and tooling services
- regional manufacturing operations
Buyer consideration: Ask which ARRK facility will manufacture your parts and its applicable capacity.
Official website / service reference ↗5. RapidDirect — Vacuum casting with online manufacturing workflow
RapidDirect offers urethane casting for functional prototypes, appearance models and short production runs, alongside CNC and injection molding services.
- Published casting specifications
- material and finish choices
- multi-process support
Buyer consideration: Confirm which published tolerances apply to your specific geometry.
Official website / service reference ↗6. HLH Rapid — In-house prototyping and vacuum casting
HLH Rapid lists vacuum casting among its in-house manufacturing processes at its Dongguan factory, together with CNC machining, 3D printing and injection molding.
- In-house manufacturing
- process variety
- project coordination
Buyer consideration: Check tooling ownership, part inspection and surface finish acceptance criteria.
Official website / service reference ↗7. WayKen — Appearance prototypes and urethane casting
WayKen provides rapid prototyping services and publishes technical guidance on silicone-mold urethane casting for small batches of plastic parts.
- Visual models
- prototyping process knowledge
- complementary CNC capabilities
Buyer consideration: Confirm transparent-part finishing and cosmetic quality with physical samples.
Official website / service reference ↗8. Star Rapid — Prototype and low-volume manufacturing services
Star Rapid is a rapid manufacturing provider associated with urethane casting, CNC machining and prototype production for product development.
- Prototype-to-production support
- cosmetic part considerations
- mixed-process projects
Buyer consideration: Confirm current vacuum casting availability and material choices directly.
Official website / service reference ↗9. 3ERP — Silicone-mold polyurethane prototype batches
3ERP explicitly offers vacuum casting to produce polyurethane parts from silicone molds for exhibitions, testing and marketing evaluations.
- Prototype batch production
- multiple fabrication processes
- custom quoting
Buyer consideration: Ask for mold life estimates and sample approval criteria.
Official website / service reference ↗10. Prototype Projects — In-house SLA master patterns and vacuum casting
Prototype Projects describes an in-house process covering SLA master patterns, polyurethane casting and subsequent finishing.
- Integrated pattern-to-part workflow
- finishing
- technical process support
Buyer consideration: Review part geometry, color matching and expected lead time.
Official website / service reference ↗11. FacFox — Online prototyping and urethane casting
FacFox publishes vacuum casting project examples for small-batch functional parts made using silicone molds and polyurethane materials.
- Project examples
- on-demand sourcing
- prototyping options
Buyer consideration: Verify supplier execution, tolerances and repeat-order consistency.
Official website / service reference ↗12. RPWORLD — Rapid prototyping and low-volume custom parts
RPWORLD serves custom prototype and low-volume manufacturing projects, with vacuum casting among the processes to confirm for a specific RFQ.
- Industrial prototyping focus
- custom manufacturing
- engineering collaboration
Buyer consideration: Confirm current vacuum casting process scope before placing an order.
Official website / service reference ↗13. Fictiv — Digital custom manufacturing procurement
Fictiv offers digital procurement and manufacturing services for custom parts; buyers should verify vacuum casting availability for their region and project.
- Managed sourcing
- engineering collaboration
- digital ordering
Buyer consideration: Verify whether urethane vacuum casting is available and who manufactures the parts.
Official website / service reference ↗14. Protolabs — Digital prototyping and manufacturing network
Protolabs offers rapid manufacturing through its own facilities and partner network; specific urethane casting availability should be checked before RFQ.
- Digital quoting
- broad prototyping capability
- production planning
Buyer consideration: Do not assume silicone-mold vacuum casting is available in every region.
Official website / service reference ↗15. Protolabs Network — Distributed manufacturing sourcing
Protolabs Network (formerly Hubs) offers a supplier network for custom manufacturing; vacuum casting capability should be verified for the selected location.
- Network procurement
- quality coordination
- access to multiple processes
Buyer consideration: Confirm process eligibility, supplier assignment and quality documents.
Official website / service reference ↗3. How to Choose a Vacuum Casting Manufacturer
Start with your functional requirements and CAD drawings. Ask each supplier to explain how its master pattern, silicone tooling and resin selection will affect dimensional accuracy, appearance and repeatability.
| Evaluation item | What to verify |
|---|---|
| Master pattern | SLA or CNC process, polishing level and approval method |
| Materials | Actual polyurethane grade, datasheet, hardness, heat resistance and color |
| Tooling | Mold life estimate, cavity strategy, ownership and replacement costs |
| Quality | Drawing-based tolerance agreement, inspection report and sample approval |
| Delivery | Master, mold, casting, finishing, inspection and shipping timeline |
| Cost | Master pattern + silicone molds + per-part cost + finishing + freight |
4. Vacuum Casting vs. Other Manufacturing Processes
Vacuum casting: A useful option for multiple near-production-looking plastic parts using silicone molds and polyurethane resins. 3D printing: Often preferable for a single fast design iteration without a mold. Injection molding: Typically more economical at sustained larger volumes after production tooling is justified. The crossover point depends on geometry, material and quantity.
5. Questions to Ask Before Requesting a Quote
- Can you produce a sample using my exact 3D model and 2D tolerance drawing?
- Which resin grade best simulates my target production plastic?
- How many acceptable parts do you expect from one silicone mold?
- Can you provide color matching, texture, transparent finishing or inserts?
- What inspection records are included?
- What is the total delivered price at 10, 25, 50 and 100 units?
- What happens if the master pattern or mold needs revision?
6. Frequently Asked Questions
What is a vacuum casting manufacturer?
A supplier that uses master patterns, silicone molds and casting resins to produce detailed plastic prototypes or small production batches.
Is vacuum casting the same as vacuum forming?
No. Vacuum casting uses liquid resin inside a mold, while vacuum forming shapes heated plastic sheet over a tool.
How many parts can a silicone mold produce?
Mold life depends on resin, geometry and processing. Ask the supplier for a project-specific estimate rather than relying on a universal number.
Can vacuum cast parts be transparent?
Some clear casting resins and finishing processes can produce transparent or translucent parts. Optical requirements should be confirmed with samples.
Is vacuum casting suitable for production parts?
It can suit selected short runs and bridge production, but mechanical properties and long-term requirements must be checked against the target application.
What files should I send for a quotation?
A STEP or other suitable CAD file, 2D drawings, quantity, material targets, finish requirements and delivery destination are a useful starting point.
Related service: Vacuum Casting Services at Senses Mold
