Illustration of Silicone Overmolding

  • Substrate
  • Bonding
  • Adhesive
  • Substrate

    Thermoplastic: such as polycarbonate (PC), polyetherimide (PEI), nylon and PPSU


    Metal: such as aluminum and common steels

    Silicone: also known as 2-shot silicone molding

  • Bonding

    Mechanical Bond: the silicone interlocks “grabs” with features on the substrate. The silicone materials are often very deformable so simply filling in a plug hole may not be sufficient to achieve desired bonding.

    Chemical Bonding: chemical reaction at the surface between the silicone and substrate, chemical silicone bonding is typically stronger, and it’s more reliable than mechanical bonding.

  • Adhesive

    Adhesive: many situations in which chemical or even mechanical bonding, the adhesive is used for better bonding. FDA grade adhesive is available.

    No Adhesive: when no adhesive is a must, self-adhesive silicone is applicable.

DX Overmolding Products

Advantages & Benefits of DX Overmolding

  • Sufficient Overmolding Projects Experience
  • Multiple Substrate Materials Available
  • Short Product Development Lead Time
  • Make Good Use of Material Properties
  • Cleanroom Production Available

How DX Overmolding Benefits You


Silicone overmolding is a process for molding silicone rubber onto a base material or object which is called substrate to create a composite component. The silicone overmold process involves two steps wherein a completed plastic or metal entity (substrate) is placed into the molding space of an LSR or compression mold, and then the silicone rubber is overmolded directly onto the part.

Recommended Application

With More than 30 Years' Experience

DX provides you with all-around silicone product customization services for valued customers like you.