Top 10 Liquid Silicone Rubber Injection Molding Manufacturers in 2026

Liquid silicone rubber injection molding is widely used for medical devices, automotive components, electronics, seals, consumer products, and other applications requiring flexibility, heat resistance, dimensional consistency, and complex part geometries.

However, choosing the right liquid silicone rubber injection molding manufacturer involves more than comparing price. Buyers should also evaluate tooling capability, process control, production scale, cleanroom capability, overmolding experience, quality systems, and engineering support.

This guide highlights 10 established LSR molding manufacturers and suppliers worth considering in 2026. The list is not intended as an absolute ranking; each company has different strengths, markets, and manufacturing capabilities.

Top Liquid Silicone Rubber Injection Molding Manufacturers at a Glance

Yijiang Technology

Yijiang Technology is a China-based precision manufacturing company providing injection molding, mold development, CNC machining, rapid prototyping, and integrated manufacturing services.

Its injection molding capabilities include Liquid Silicone Rubber molding, conventional thermoplastic injection molding, insert molding, and overmolding. The company operates a 10,000+ m² manufacturing facility with more than 30 injection molding machines and equipment covering approximately 50T to 2500T clamping capacity. yijiang

A key advantage is its integrated manufacturing model. Customers can combine mold development, injection molding, CNC machining, secondary processing, assembly, and production support under one supplier.

Best suited for:

• Custom LSR components
• Industrial products
• Automotive components
• Plastic and silicone assemblies
• Projects requiring tooling and machining
• OEM and ODM manufacturing

For international buyers seeking a manufacturing partner in China, Yijiang can be particularly suitable when a project involves several manufacturing processes rather than LSR molding alone.

SIMTEC Silicone Parts

SIMTEC is one of the most specialized LSR manufacturers on this list. Based in Florida, the company focuses on custom Liquid Silicone Rubber injection molded parts, two-shot components, multi-shot molding, and silicone overmolding.

Its production systems are highly automated and include ISO Class 8 cleanroom manufacturing. SIMTEC also provides DFM, prototype production, high-volume molding, inspection, post-curing, assembly, and other secondary operations. SIMTEC

Best suited for: high-volume medical, automotive, healthcare, and technically complex LSR components.

Trelleborg Sealing Solutions

Trelleborg is a major global manufacturer of engineered polymer and sealing products.

Its LSR capabilities include high-precision Liquid Silicone Rubber injection molding, micro components, multi-component molding, and cleanroom production. Trelleborg states that its LSR processes can support components ranging from extremely small parts to much larger molded products. 特瑞博集团

The company is especially strong in applications where sealing performance, tight tolerances, material reliability, and large-volume production are important.

Best suited for: automotive, medical, electronics, sealing, and industrial applications.

ProMed Molded Products

ProMed specializes in silicone and plastic manufacturing for highly regulated industries.

The company supports customers from early product development through tooling, process development, molding, assembly, and commercial production. It has more than 30 years of experience working with complex molded silicone and plastic components. ProMed Molded

Its focus on regulated applications makes ProMed particularly relevant for products where traceability, process validation, and quality documentation are critical.

Best suited for: medical devices, pharmaceutical products, healthcare components, and regulated applications.

Silcotech

Silcotech is a Canadian manufacturer specializing in Liquid Injection Molding.

The company has more than 40 years of experience and supplies high-volume precision silicone components for industries including healthcare, automotive, packaging, and consumer electronics. Its services cover product development, tooling, molding, and mass production. Silcotech - Precision Silicone Parts

Best suited for: precision silicone parts requiring stable, high-volume manufacturing.

Nolato

Nolato provides advanced injection molding for thermoplastics, LSR, and multi-material components.

Its silicone capabilities include automated LSR injection molding, two-shot molding, insert molding, overmolding, cleanroom manufacturing, tooling, assembly, and product development. Nolato also operates a global manufacturing network. 诺拉托

This makes Nolato particularly attractive for companies developing sophisticated products combining silicone with plastic, metal, or other components.

Best suited for: medical devices, electronics, complex assemblies, and high-volume multi-material products.

Freudenberg Medical

Freudenberg Medical focuses strongly on medical-device manufacturing.

Its facilities provide LSR injection molding, insert molding, silicone overmolding, micro molding, automation, secondary operations, assembly, and cleanroom production. Its Beverly facility, for example, operates ISO Class 8 cleanrooms and is ISO 13485 certified. Freudenberg Medical

Best suited for: medical-grade silicone components, wearables, diagnostic devices, and precision healthcare products.

RICO

Austria-based RICO specializes in silicone tooling and automated production.

The company produces both LSR and high-temperature-vulcanizing silicone parts and has extensive experience with multi-component molding. RICO states that its production systems manufacture very high volumes using automated processes. RICO Elastomere Projecting GmbH

One of its key strengths is combining mold engineering, automation, and mass production.

Best suited for: automotive, healthcare, industrial, household, and high-volume silicone components.

MRPC

MRPC provides LSR, high-consistency rubber, thermoplastic molding, overmolding, and multi-material molding.

Its manufacturing capabilities include Class 7 and Class 8 cleanroom environments, tooling, process validation, metrology, assembly, and medical-device production. MRPC - Just another WordPress site

The company is particularly focused on medical, diagnostic, and life-science applications.

Best suited for: precision medical silicone components and cleanroom manufacturing.

Extreme Molding

Extreme Molding is a U.S.-based silicone injection molding company serving consumer and life-science markets.

Its capabilities include silicone injection molding, silicone-to-plastic overmolding, metal and electronics encapsulation, assembly, packaging, and fulfillment. The company also holds ISO 9001 and ISO 13485 certifications. Extreme Molding

Best suited for: consumer healthcare products, baby products, specialty silicone products, and projects needing downstream assembly.

How to Choose an LSR Injection Molding Manufacturer

The best supplier depends heavily on your product requirements.

When evaluating manufacturers, consider several important factors.

Material experience:
Your supplier should understand medical-grade, food-grade, high-temperature, electrically insulating, and other specialized silicone formulations.

Tooling capability:
LSR molds require tight temperature control, accurate venting, reliable sealing, and optimized runner systems.

Tolerance and part complexity:
Thin membranes, seals, micro parts, undercuts, and silicone-to-plastic assemblies require significantly more engineering experience.

Production quantity:
A supplier optimized for millions of parts may not necessarily be the best option for prototypes or lower-volume programs.

Secondary processes:
Consider whether the manufacturer can perform post-curing, trimming, inspection, assembly, printing, packaging, or CNC machining.

Quality requirements:
For medical, automotive, or other regulated applications, confirm relevant quality systems and certification requirements before placing an order.

Why Consider Yijiang for Custom LSR Manufacturing?

For projects that require more than a single molding process, working with an integrated manufacturer can simplify the supply chain.

Yijiang combines mold development, injection molding, LSR molding, CNC precision machining, rapid prototyping, low-volume production, secondary processing, and assembly.

Its manufacturing facility includes 30+ injection molding machines and supports both small precision components and large molded parts. yijiang

This integrated model can be useful for products containing combinations of:

• Silicone components
• Injection-molded plastic parts
• Metal inserts
• CNC-machined components
• Custom tooling
• Final assemblies

Customers can therefore work with one manufacturing partner from prototype development through mass production.

Frequently Asked Questions

What is Liquid Silicone Rubber injection molding?

LSR injection molding is a thermoset manufacturing process in which two liquid silicone components are precisely mixed and injected into a heated mold. The material then cures to form a flexible, durable silicone component.

What products are commonly made using LSR molding?

Typical applications include seals, gaskets, membranes, medical components, electrical connectors, automotive parts, baby products, wearable devices, valves, and consumer products.

Is LSR suitable for high-volume production?

Yes. Automated Liquid Silicone Rubber injection molding is particularly suitable for repeatable high-volume manufacturing once the mold and production process have been properly developed.

Can silicone be molded over plastic or metal?

Yes. LSR can be used in insert molding and overmolding applications involving compatible thermoplastics, metals, and other substrates. Material bonding and product geometry should be evaluated during the design stage.

What information should I provide for an LSR molding quotation?

Ideally, provide a 3D CAD file, 2D drawing, silicone grade or hardness requirement, quantity, tolerance requirements, color, application, and any regulatory requirements.

How do I select the best LSR injection molding manufacturer?

Compare suppliers based on engineering expertise, mold manufacturing capability, automation, quality control, material experience, production capacity, certifications, and ability to support your expected production volume.