Precision Injection Molding
Two Shot Molding
What Is Overmolding?
Overmolding (also called insert or two-shot molding when combining multiple materials or components) is the process of molding one material (often soft or flexible) over or around a second component (rigid plastic, metal insert, etc.). The result is a single, durable, precision part that combines the best properties of each material – for grip, seal, comfort, or function.
Overmolding Capabilities at National Molding
- Part of our DFM & Material Science services: we offer overmolding, insert molding, and two-shot molding among our multiple molding options.
- Our Miami facility has overmolding capability. It supports custom overmolding and insert overmolding operations.
- We can handle a wide range of tooling sizes and tonnages, supporting molded components with inserts or secondary materials added in-mold.
Benefits of Overmolding
National Molding delivers more than just overmolded parts—we provide expertise, flexibility, and quality control at every stage. Our customers benefit from:
Enhanced functionality - combining rigid bases with soft overmolds for improved grip, sealing, or tactile performance. Reduced assembly steps - single-piece solutions that eliminate secondary bonding or fastening. Durability and reliability - overmolded components resist loosening and provide long-term product integrity. Design flexibility - wide range of material combinations, textures, colors, and inserts to achieve your desired outcome.
Deep expertise - decades of overmolding and insert molding experience across multiple facilities. Material science knowledge - proven ability to match rigid and flexible materials for optimal adhesion and performance. Tooling and value-added services - in-house mold management, maintenance, and integrated post-molding solutions. Quality assurance - engineering support and documented processes that ensure consistent results from DFM through full-scale production.
National Molding
Let’s Build Precision Together
From first concept to full production, National Molding is your partner for high-performance, precision-molded components. Contact us today to start your project.