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Trustbridge

  • Urethane Casting & RTV Silicone Molding Services 

    High-fidelity Vacuum Casting for bridge tooling and low-volume production. Get ABS-like, PP-like, and clear parts in as fast as 10 days.

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Bridge Tooling & Low-Volume Manufacturing 

The Trustbridge network covers urethane and silicone casting — the bridge between 3D printing and injection molding for short-run prototypes, marketing samples, and low-volume production. Vacuum casting uses a 3D-printed master pattern to create a silicone mold, producing 20–50 production-grade parts without hard tooling. Every casting partner in the network is vetted.

Casting tolerances

What Tolerances Can You Expect?

Casting tolerances vary by part geometry and process control, but our suppliers consistently achieve:

  • Typical Tolerances: ±0.010 to ±0.015 in (0.25–0.38 mm)

  • Higher Precision: ±0.005 in (0.13 mm) with controlled geometries and mold design

  • Surface Finish: Smooth surfaces directly from molds, comparable to injection molded parts

  • Color Matching: Pantone or custom color matching available with pigmented resins

Our engineering team works with you to plan part geometry, mold design, and process settings for optimal accuracy.

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Materials We Support in Urethane and Silicone Casting

Our network offers an extensive range of castable materials, simulating properties of production-grade thermoplastics and rubbers:

  • Rigid Urethane Resins (Thermoplastic-Like):

    • ABS-Like: High impact strength for snap fits.  
    • PC-Like (Clear): Optical clarity for lenses. 
    •  PP-Like: Flexible fatigue resistance. 

  • Elastomeric & Rubber Casting :

    • Medical-grade silicone

    • Food-grade silicone

    • Soft-touch applications

    • High-durometer silicone

    • Heat-resistant silicone

Need a specific durometer or property? We’ll help you match your desired material with the closest available resin system.

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Materials We Support in Urethane and Silicone Casting
Technologies in Our Casting Network

Technologies in Our Casting Network

We support both urethane and silicone casting workflows using high-precision tooling methods:

  • RTV Silicone Mold Making – Room temperature vulcanization molds for fast turnarounds

  • Vacuum Casting – Removes air bubbles and ensures consistent material flow

  • Pressure Casting – For high-clarity parts or complex geometries

  • Master Pattern Creation via CNC or 3D Printing – Ensures mold precision and surface finish

  • Multi-cavity & Multi-shot Molds – For faster turnaround and complex material systems

Our partners are equipped with advanced casting stations, cleanrooms, and color-matching labs.

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Industries We Serve

Casting is ideal for functional prototypes, bridge production, and limited-run parts in:

  • Consumer Products & Wearables

  • Medical Devices

  • Robotics & Automation

  • Automotive Interiors

  • Industrial Equipment

  • Packaging & Display Models

  • Toys and Soft Goods Prototyping

Trustbridge partners understand the cosmetic and functional requirements unique to your use case.

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Casting is ideal for functional prototypes, bridge production, and limited-run parts
200+ casting partners in North America, Europe, and Asia

Our Global Supplier Network

Our network includes casting specialists vetted for quality, consistency, and turnaround:

  • 200+ casting partners in North America, Europe, and Asia

  • ISO 9001 and ISO 13485 certified vendors

  • Fast-turn options for small runs and urgent deadlines

  • Color-matching & texture replication experts on staff

  • Integrated CNC + 3D printing hubs for quick master pattern production

Every vendor is pre-qualified for material capability, cosmetic precision, and communication quality.

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Case Study Highlight

Customer: Wearable Tech Startup
Service: Urethane Casting
Challenge: Needed 300 clear, wearable enclosures with snap fits and soft-touch buttons
Solution: Trustbridge routed the job to a dual-shot casting facility with vacuum molding capability
Result: Delivered within 10 business days with production-quality aesthetics and tactile feel

“We couldn’t justify injection mold tooling yet. Trustbridge’s casting partners gave us near-production parts and fast iterations.”

— Founder, IoT Device Startup

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Wearable Tech Startup

Frequently Asked Questions

What’s the difference between urethane and silicone casting?

Urethane casting is used for rigid and flexible plastic-like parts. Silicone casting is ideal for rubbery, soft, or heat-resistant parts.


Can I get clear or tinted parts?

Yes — we offer water-clear urethanes and pigmented resins in custom or Pantone-matched colors.



How many parts can be made per mold?

Typically 20–25 shots per mold, depending on geometry and resin chemistry.


What file types do you accept?

STEP, IGES, STL, and native CAD files for master pattern production.

Can you handle overmolding or dual-shot parts?

Yes — many partners offer soft-over-hard or two-material casting options.



Production Quality, Without the Tooling Cost

Injection-Molded Quality Without Steel Tooling
Casting delivers injection-molded surface finish and material properties without hard tooling — including cosmetic matching (texture and polish) for marketing samples.


No Blind Bidding
The shop making the parts is never hidden. Work is routed to a vetted partner whose capabilities — and limits — are visible up front, not buried behind an anonymous quote.


Engineering Review Before Tooling
Every casting project gets a technical pass — design, material, and finish checked so parts are production-ready before a mold is cut.


Prototype to Low-Volume Production
Casting scales from a handful of samples to low-volume production runs, with consistent quality batch to batch, routed to a shop that fits the volume.

Process-Matched Supplier Selection

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