KINTAT is a leading provider of produced parts using the LSR injection molding process for major OEMs throughout the world. Our advanced production capabilities, outstanding quality control, and more than 15 years of exclusive experience with LSR components makes us an ideal partner for your next project.


Overmold injection molding is a two-step process wherein a completed plastic or metal entity is placed into the mold site of an LSR mold, after which the LSR is overmolded directly onto the part.

One of the benefits of liquid silicone overmolded parts and components are that the manufacturing process allows for the use of a non-plastic substrate, such as steel. It is important to note that overmolding is the only way to incorporate two materials, between thermoplastics and LSRs, into the injection molding process.


LSR injection molding is a cost-effective and versatile process used by manufacturers in a large number of industries and applications. From LSR overmolded handles to complex electronic assemblies, there are multiple reasons why overmolding is a good choice for your project:

  • Cost and time savings —By molding silicone directly onto a metal or plastic substrate, you’ll save the expense and time required to assemble a complex part manually. This can dramatically reduce your manufacturing costs and turnaround time, allowing you to get your product to market more economically.
  • Design flexibility —LSR injection molding is excellent for meeting the complex design requirements of the automotive and medical industries. Overmolding produces parts that are waterproof, airtight, and more resistant to shock and vibrations.
  • Quality control —The LSR injection overmolding process offers high tolerance and strict quality control, making it suitable for use in any application where precision is required. KINTAT can produce overmolded parts to your exact specifications, including devices that require manufacturing in a 100,000 Class clean room.

To learn more about the benefits of LSR overmolding/ insert plastic molding, or to discuss the details of your upcoming project and determine whether or not overmolding is an option, contact KINTAT today.



LSR is the raw material of choice for various overmolding injection molding applications. It offers superior durability, high fatigue and tear resistance, excellent insulation, and environmental sealing properties when is used as a housing for delicate components. It is also hypoallergenic/biocompatible.

As a result, custom LSR overmolding is often used in the manufacturing of medical devices, electronics and automotive parts, as well as a wide range of consumer goods.



KINTAT has produced many overmolded parts. We can customize our QA procedures to meet your specific requirements. We are ISO 9001:2008, ISO 13485:2003, and ISO/TS 16949:2002 certified, and we are able to boast one of the lowest defect rates in the industry.

In addition to quality control, every aspect of the LSR overmolding process can be customized to produce liquid silicone parts to your specifications. We can assist with economical mold development, prototyping, and more. Contact KINTAT directly to learn more about our services.