Urethane Casting Service
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Urethane Casting Service



- Top Rapid Urethane Casting Service Advantages -

Production Quality at Low Volumes
This process is a quick, cost-effective way to produce 10-200 units with production-level quality. Typically, each silicone mold will produce 20 castings.


Complex Elastomeric Parts
Urethane casting is ideal for prototyping elastomeric parts such as complex gaskets and overmolds on rigid parts.


High Level of Detail
Urethane casting allows for almost limitless complexity, including sharp internal corners unachievable with CNC machining, and designs without draft or uniform wall-thickness that can’t be injection molded.




- Urethane Casting Materials -


    Hardness Colors Applications
ABS-Like ABS-Like is a general purpose polyurethane plastic that simulates ABS thermoplastic. This material is a great choice for most product enclosures.  
All colors; precise pantone color matching available

General purpose, product enclosures
Acrylic-Like Acrylic-Like is a stiff, transparent polyurethane plastic that simulates acrylic (PMMA). This material is great for see-through applications such as light pipes. Shore D 87  Clear Light pipes, see-through applications
Opaque Elastomer Opaque Elastomer is a polyurethane plastic that simulates all kinds of rubber-like materials such as TPE, TPU, and silicone rubber. This material is great for wearables, gaskets, and overmolds and is available from Shore 20A to Shore 90A in 10A increments.
Shore A 20, 30, 40, 50, 60, 70, 80, 90

All colors; precise pantone color matching available
Wearables, gaskets, overmolds
Waterclear Elastomer Waterclear Elastomer is a urethane casting material that simulates all kinds of rubber-like materials such as TPE, TPU, and silicone rubber. Shore A 30, 40, 50, 60, 70, 80 Clear Wearables, gaskets, overmolds




- Urethane Casting Case Study -





Custom CNC machining parts machining services for rapid prototyping, new product introduction and low-volume production.













- From Prototype to Production -


Concept stage
Looks-like models for marketing photography, investor pitches, and trade shows

Early prototyping stage
Prototype elastomeric parts such as complex gaskets

Late prototyping stage
Cost effective way to produce 100 EVT unitsbefore cutting injection molding tool

Late prototyping stage
Low-volume production orders for customized, small-batch products (20-200 units at a time)





- What is Urethane Casting -



About the Urethane Casting Process

Urethane casting (also known as RTV molding, cast urethane, and silicone molding) is a fabrication method that uses silicone molds to produce production-quality plastic parts.

Urethane Casting production consists of three main steps:

1. Build a master pattern using 3D printing or CNC machining
2. Build the mold by pouring platinum silicone around master
3. Pour liquid polyurethane resin into mold, create polyurethane casting under vacuum

Advantages of Urethane Casting

With urethane casting, you can get production quality parts at low volumes and without the high costs and lead times of steel or aluminum tooling. This is helpful for bringing new products to market where you may want production-grade products to test with new customers and markets and validate your design hypotheses before making a substantial investment to scale manufacturing.

Urethane Casting Design Considerations

If you are familiar with designing parts for injection molding, you can apply the same best practices and rules of thumb to design parts for urethane casting.