Produce detailed plastic, rubber or silicone parts
Cost-effective alternative to injection molding
Ideal for small runs of functional or cosmetic prototypes
Urethane casting is a soft-tooling manufacturing method used to produce small quantities of high-quality plastic, rubber and silicone parts. It relies on silicone molds, which are quick to make and inexpensive, allowing detailed components to be created efficiently.
This process is far more affordable than injection molding because it avoids the need for costly machined metal molds. The silicone molds also support a range of high-performance materials that closely mimic those found in commercial products.
As a result, urethane casting is widely used for producing functional and cosmetic prototypes in limited quantities. It helps designers refine their concepts before investing in injection-molding tooling and also serves as a practical option for low-volume production.
Urethane cast parts can be painted or tinted to match virtually any Pantone color, allowing tight brand or product alignment. They can also be produced with a wide range of textures and surface finishes, closely replicating the look of final production parts.
The urethane casting process captures intricate geometries and fine features with high accuracy. This makes it ideal for components with complex shapes that require precise detailing without the cost of hard tooling.
Silicone molds deliver excellent surface quality and can reproduce production-like colors and textures with impressive fidelity. The resulting urethane parts often match or exceed the performance of injection-molded components and are noticeably stronger than many 3D-printed alternatives.
Urethane materials can be formulated to achieve anything from rigid plastics to flexible, rubber-like elastomers. They can even be cast in transparent grades, supporting applications that require clear or optical-quality parts.
Because molds are quick to produce, urethane casting significantly shortens development cycles. This speed enables rapid prototyping, bridge production, and short-run manufacturing, helping you validate your designs and move your products to market faster.
Urethane casting requires no expensive metal tooling, making it highly economical for small-batch or prototype builds. This allows teams to test multiple design iterations without large upfront capital investments.
Silicone molds degrade after repeated use, typically lasting only 15–25 shots depending on part complexity and material. This makes the process less suitable for medium- to high-volume production runs.
Each cast requires curing time, which slows the overall production rate. As a result, urethane casting cannot match the rapid cycle speeds of automated injection molding.
Although detailed, silicone molds can experience slight expansion or shrinkage, reducing dimensional repeatability. Parts with extremely tight tolerances may require post-processing or a different manufacturing method.
Partner with Experts Who Get It Right the First Time
Every project is reviewed by a seasoned manufacturing engineer to optimize part design, material selection, and tooling strategy — ensuring smarter decisions before steel is cut and production begins.
Concept Models
Urethane casting allows designers to create realistic, production-like models that accurately represent the form, fit, and appearance of a final product.
Marketing Test Samples
High-quality cast parts can be produced quickly for use in customer evaluations, photoshoots, focus groups, or early promotional efforts.
Point-of-Purchase Displays
The process supports detailed, visually appealing components that enhance retail displays and can be produced in small quantities without expensive tooling.
Medical Devices
Urethane casting enables the creation of precise, durable components for medical prototypes or low-volume devices where accuracy and material performance are critical.
Specialty Overmolding
The method allows different urethane materials to be cast together, creating layered or soft-touch surfaces over rigid substrates for enhanced functionality and ergonomics.
Soft, Rubber-Like Parts
Flexible urethane formulations can replicate the feel and performance of rubber, making it ideal for grips, seals, cushions, and other elastomeric components.
For low-volume production of parts, it’s often less expensive than injection molding or additive manufacturing.
Urethane casting can be used to quickly produce prototype parts that mimic the look and feel of injection molding, before committing to tooling.
It can be used to produce parts with complex geometries that may be challenging to create using other manufacturing methods.
Produce parts with a wide range of hardness – ideal for comparing different versions of the same part side-by-side.
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Urethane casting is a manufacturing process that uses silicone molds to produce high-quality plastic or rubber parts in low volumes
Most silicone molds can be produced within a few days, depending on the complexity of the master pattern.
A typical silicone mold lasts for about 15–25 castings before it begins to lose detail or degrade.
A wide range of rigid, flexible, and clear urethane resins can be used to simulate various production-grade plastics.
Cast parts generally offer excellent detail and surface quality, though extremely tight tolerances may require post-processing.
Yes, they can be painted, tinted, textured, or coated to closely match production aesthetics.
Many urethane materials mimic the mechanical properties of injection-molded plastics, making them ideal for functional prototypes.
Urethane casting typically produces stronger, smoother, and more production-like parts, especially for prototypes or small batches.
Partner with Experts Who Get It Right the First Time
Every project is reviewed by a seasoned manufacturing engineer to optimize part design, material selection, and tooling strategy — ensuring smarter decisions before steel is cut and production begins.
