Urethane Casting

Bridge the gap from prototype to production

WHAT IS URETHANE CASTING?

Urethane casting (also known as RTV molding, cast urethane, and silicone molding) is a fabrication method that uses silicone molds to produce production-quality parts, without the high costs and lead times of steel or aluminum tooling.

Parts can be fabricated and delivered in just 10 business days.

Urethane Casting Materials
ABS-Like
A general-purpose opaque material that simulates ABS thermoplastic. Good for most hardware product enclosures.

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Opaque Elastomer
Simulates all kinds of rubber-like materials such as TPE, TPU, and silicone rubber. Great for wearables, gaskets, and overmolds. Available from Shore 20A to Shore 90A in 10A increments.

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Waterclear Elastomer
Simulates all kinds of rubber-like materials such as TPE, TPU, and silicone rubber. Great for wearables, gaskets, and overmolds. Available from Shore 20A to Shore 90A in 10A increments.

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COLORS AND FINISHES

Urethane casting standard finish option for polyurethane

Standard

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.

COMMON 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)

URETHANE CASTING DESIGN GUIDE

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, use our Urethane Casting Design Guide.

Download Free Urethane Casting Design Guide