Liquid Silicone Rubber (LSR) Injection Molding

Liquid Silicone Rubber (LSR) can be pigmented a wide range of colors. The raw material is opaque and partially transparent. It is shown next to a light blue pigment and grey pelletized thermoplastic .

Liquid Silicone Rubber (LSR) is an incredibly diverse material with countless uses. Explore our site to learn more about applications where LSR is already commonly used because of its material properties.

Silicone rubber manufacturing is characterized by consistent quality and speed. Regardless of whether the part geometries are simple or complex, this technology enables the production of high precision components with tight tolerances. At SIMTEC Silicone Parts, our incredibly stable process allows for continuous manufacturing of high quality components, making this the perfect fit for applications with high volume demands. Unlike other production methods, LSR injection molded parts and components are flash-free with minimal gate indications, and the process is scalable from single cavity prototyping to high-volume production using high cavity tooling.

Industry Applications

Automotive — LSR’s durability, high thermal stability, fatigue and tear-resistance, and other properties make it an excellent choice for silicone rubber automotive components. SIMTEC can mold silicone rubber elastomers directly onto plastic or metal components, or create standalone components such as gaskets, O-rings, buttons, wiring harness components, and more. Our high-volume production capabilities make us an ideal partner for automotive OEMs as well as 1st and 2nd tier automotive suppliers.

Healthcare/medical — Medical devices must be hypoallergenic, mold and bacteria-resistant, and biocompatible. However, they must remain strong enough to deliver reliable performance and value to end users. Medical-grade LSR is available to meet these and other requirements of healthcare product suppliers. In the past, we have produced flow control valves, syringe stoppers, and other components for some of the world’s most prestigious original equipment manufacturers.

Consumer products — The diverse range of consumer goods with LSR components is a testament to its versatility as a raw material. LSR products range from bakeware and plastic showerheads to printer rollers, gaskets, bottle dispensers, and more.

In addition to these specific industry applications, SIMTEC has the manufacturing capabilities required to fulfill a variety of special requests and project specifications. We work with leading silicone rubber suppliers to offer a diverse range of raw materials, including self adhesive and oil bleeding grades of LSR. To discuss the specifics of your project and request a quote, contact SIMTEC directly.


Since 2001, SIMTEC has been a leading Liquid Silicone Rubber parts manufacturer, serving some of the world’s largest companies. Our advanced capabilities encompass all aspects of the design and production processes. We can help you choose the right grade of LSR for your part and develop economical tooling and packaging solutions that keep your overhead costs low.

The Quality Control Experts

Today’s businesses require silicone molded parts that adhere to exceptionally tight tolerances. At SIMTEC, we can tailor our quality control processes to meet your specific requirements. As a result, our production facility boasts one of the lowest defect rates in the industry.

Custom Solutions for Your Business

SIMTEC has dedicated its focus exclusively to silicone rubber manufacturing and has mastered the production of both high quality LSR parts and LSR 2-Shot components. Our expertise in this area allows us to tailor the entire process to your specifications, yielding true innovation. SIMTEC provides extraordinary solutions, taking “custom” to a new level.

If you need a manufacturing partner you can trust, contact SIMTEC today. To learn more about what we can do for you, we encourage you to visit our other Capabilities pages, or our Markets pages to learn more about industry-specific applications and the benefits of LSR.