Custom Automotive Connector Peripheral Seal | LSR Overmolded Housing Gasket Manufacturer

Custom automotive connector peripheral seals are designed to create a reliable waterproof boundary between the plastic connector housing and the mating interface. This product is manufactured by overmolding liquid silicone rubber (LSR) onto an engineering plastic substrate to form a continuous sealing lip around the connector face.

Compared with separate rubber rings or manually assembled gaskets, an LSR overmolded housing gasket offers more stable positioning, cleaner sealing boundaries and better assembly consistency. The silicone is formed only where sealing is required, while the terminal cavities and electrical contact areas remain open and functional. This structure is widely used in waterproof automotive electrical connectors exposed to vibration, dust, moisture and temperature cycling.

The housing is typically made of engineering plastics such as PA66 or PBT, while the sealing area is made of liquid silicone rubber. The silicone is overmolded around the connector perimeter to create a continuous sealing path. Typical design features include a continuous perimeter sealing lip, stable bonding between silicone and plastic, open terminal cavities, and support for IP67 or IP68 sealing targets depending on the final assembly design.

This type of overmolded connector housing gasket is widely used in EV battery systems, automotive lighting connectors, sensor connectors, ECU housings, wire harness interfaces and other waterproof electrical assemblies. We can customize connector shape, cavity count, sealing lip geometry, silicone hardness, plastic substrate material, color and waterproof performance targets according to your drawing or sample.

To get a quotation, please send us your 2D/3D drawing, sample, target application, testing requirements and estimated order quantity. Our team can support engineering review and propose a suitable LSR overmolding solution based on your connector design.