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 helps us to mitigate risk without the massive investment in a costly injection molding tool"
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.
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.
A variety of textures can be achieved by texture painting the master prior to mold making or by painting the parts after casting.
Looks-like models for marketing photography, investor pitches, and trade shows
Prototype elastomeric parts such as complex gaskets
Cost effective way to produce 100 EVT units before cutting injection molding tool
Low-volume production orders for customized, small-batch products (20-200 units at a time)
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.