Overmolding (also known as two-shot or multi-component injection molding) is widely used in sectors such as power tools, consumer electronics, medical devices, and automotive interiors. It enables manufacturers to combine a rigid plastic structure with a soft, tactile outer layer, thereby enhancing ergonomics, shock absorption, and sealing capabilities.
However, delamination—where the soft elastomer peels away from the rigid substrate—remains one of the most common production failures. Here is how engineering teams can ensure a durable bond between the elastomeric material and the rigid substrate.