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3d Printing


CNC Machining

MillingTurning (Lathe)

Injection Molding

Process Overview

Urethane Casting

Process Overview

Sheet Metal Fabrication

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Urethane casting Services

Parts Time
instant quotes & dfm feedback
Parts Time
production grade quality
Vetted Partners
parts as fast as 10 days

Fictiv urethane casting advantages

Urethane casting Materials


ABS-Like is a general purpose polyurethane plastic that simulates ABS thermoplastic. This material is a great choice for most product enclosures.

Colors: All colors; precise pantone color matching available
Applications: General purpose, product enclosures
Cost: $
Process: Fused Deposition Modeling (FDM)

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ABS-like urethane casting material

Acrylic-Like is a stiff, transparent polyurethane plastic that simulates acrylic (PMMA). This material is great for see-through applications such as light pipes.

Color: Clear
Hardness: Shore D 87
Cost: $$
Applications: Light pipes, transparent applications

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Acrylic-like urethane casting material
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.

Colors: All colors; precise pantone color matching available
Hardness: Shore A 20, 30, 40, 50, 60, 70, 80, 90
Cost: $$
Applications: Wearables, gaskets, overmolds

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opaque elastomer urethane casting material
Waterclear Elastomer

Waterclear Elastomer is a urethane casting material 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 30A to Shore 80A in 10A increments.

Colors: Clear
Hardness: Shore A 30, 40, 50, 60, 70, 80
Cost: $$$
Applications: Wearables, gaskets, overmolds

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waterclear elastomer urethane casting material
Download Material Datasheet
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Download Urethane Casting Material Datasheet
lim innovations prosthetic device urethane cast partslim innovations prosthetic device urethane cast partslim innovations r&d lab
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urethane casting case study
"I love the web portal — it’s quick, simple, and easy to use. The instant feedback is a great way to check my work and then make any necessary revisions to improve the design or lower the cost."
—Preston Fung, R&D Engineering Manager, Lim Innovations
Parts Made
Hundreds of Quality parts for prosthetic devices
Parts Time
10 day production

Urethane casting COLORS AND FINISHES

Urethane casting standard finish option for polyurethane


Pigment is added to the liquid polyurethane prior to casting, so each casting has as-molded color. Customers may provide Pantone code for approximate color matching.

Urethane casting precise color match finishing

Precise Color Match

Paint is recommended for parts that require exact color matching. Very light colors or specific shades of white may only be achievable with painting. Pantone code or sample swatch must be provided for precise color matching.

Urethane casting custom textures finishing option

Custom Textures

A variety of textures can be achieved by texture painting the master prior to mold making or by painting the parts after casting.

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View Texture Options

Custom urethane casting Applications


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 units before cutting injection molding tool

Low-volume production

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

Our Quality Promise

Inspection reports included with every order
100% visual inspection for every part
Highly vetted urethane casting partners
Quality guaranteed. If your parts aren't made to spec, we'll make it right.

Technology overview: 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:

. 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. For a detailed resource on how to design your parts for urethane casting, download our free Urethane Casting Design Guide.

urethane casting resources

urethane casting material datasheet

Get details on material hardness, elongation at break, tensile strength, tensile modulus of elasticity, flexural strength, and flexural modulus of elasticity.

download datasheet
design Guide
best practices for urethane casting part design

Learn best design practices to set you up for success with urethane castining, including guidelines on: tolerancing, wall thickness, rib design, draft guidelines, threaded holes, and more.

download free guide