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Liquid Silicone Rubber injection Molding

With 50 years of expertise, Nolato provides cost-effective, precision-engineered LSR (Liquid Silicone Rubber) injection molding for complex silicone components and assemblies — from prototype to high-volume production.

We specialize in silicone injection molding solutions that combine advanced automation with quality assurance. Our fully automated production cells integrate robotic systems capable of handling everything from straightforward component removal to complex multi-material molding configurations. This high level of automation ensures consistent cycle times, reduces contamination risks and part variability, and delivers enhanced product quality—all while maintaining low program costs. Additionally, our in-house tool shop brings deep expertise in the design and manufacturing of silicone molds, further strengthening our ability to meet the highest standards of reliability and performance. 

LSR applications for critical components

LSR (Liquid Silicone Rubber) is widely used in critical applications where failure is not an option. We specialize in tight-tolerance LSR injection molding, delivering shot-to-shot repeatability and reliable, high-volume production for demanding industries.

Automatic silicone molding

Our fully automated LSR injection molding ensures consistent cycle times, reduces manual handling, and improves production efficiency while maintaining exceptional quality standards and repeatability.

Liquid Silicone Rubber (LSR) design flexibility

Liquid Silicone Rubber enables:
  • Tighter tolerances compared to thermoplastic elastomers
  • Anti-allergenic and biocompatible material performance
  • Precision features and complex geometries
  • Consistent wall thickness and reduced sink
  • Undercuts and negative drafts without secondary processing

Biocompatibility and performance properties

LSR is ideal for medical and healthcare applications, including short- and long-term implants, due to its:

  • Bacterial resistance
  • Sterilization compatibility
  • Odorless, tasteless, and stain-resistant properties

Durable and sustainable LSR solutions

Silicone is highly resistant to environmental factors, ensuring long-lasting product durability:
  • UV, heat, and moisture resistance
  • No discoloration or loss of transparency over time
  • Scratch, crack, and break resistance

Multi-material LSR molding

We specialize in multi-material molding solutions, including:
  • Two-shot molding
  • Insert molding
  • Overmolding

These techniques expand product performance possibilities by enabling integrated silicone-plastic and silicone-metal solutions — often eliminating secondary assembly steps.

Injection Molding Silicone Production

Why choose Nolato for LSR molding

Choosing Nolato for your Liquid Silicone Rubber injection molding means partnering with a global expert that delivers: 
  • Proven expertise with decades of LSR molding experience
  • Automated, high-yield production capacity
  • Tailored tooling and process engineering
  • Consistent, high-quality components with repeatable precision
Whether your project demands medical-grade precision or rugged industrial performance, our LSR solutions offer reliability from prototype to high-volume production.
Injection Molding Silicone Production

TECHNOLOGY & PRODUCTION

Automatic LSR and HCR injection molding

Our state-of-the-art LSR cleanrooms are equipped with all-electric and hybrid molding machines, allowing us to:

  • Match the best machine to each prototype & production application
  • Utilize robotics for precision insert-loading & part extraction
  • Mold parts ranging from fractions of a gram to large-scale components
  • Manufacture high-consistency rubber (HCR) using advanced compression molding
Injection Molding Silicone Production

MANUFACTURING

Concept-to-market silicone manufacturing

Nolato offers a full-service LSR manufacturing process, including:

  • Product development & engineering
  • Prototyping & production-representative tooling
  • Advanced mold-making for LSR
  • Cleanroom silicone injection molding
  • Multi-shot & multi-material molding
  • Secondary operations & assembly

FAQ

What does LSR stand for?

LSR stands for Liquid Silicone Rubber. It is a two-component, platinum-cured silicone elastomer that is processed in liquid form and cured inside a heated mold. LSR is widely used for high-precision parts requiring durability, flexibility, and consistent quality.

What is Liquid Silicone Rubber injection molding?

Liquid Silicone Rubber injection molding is a manufacturing process where LSR material is mixed, metered, and injected into a heated mold. The material vulcanizes inside the tool, creating fully cured silicone parts with excellent repeatability, tight tolerances, and high-volume scalability.

What are the main advantages of LSR injection molding?

LSR injection molding offers several key benefits, including:

  • High precision and repeatability

  • Excellent surface finish and minimal flash

  • Fast cycle times and high-volume production capability

  • Outstanding thermal, chemical, and UV resistance

  • Biocompatibility for medical and healthcare applications

These advantages make LSR ideal for demanding applications where consistent performace is critical.

What industries typically use LSR molded parts?

LSR molded components are commonly used in:

  • Medical and life science (seals, valves, diaphragms, device components)
  • Automotive (sensor parts, connectors, sealing solutions)
  • Industrial applications (precision gaskets, membranes, insulation parts)
  • Consumer and electronics (durable flexible components, sealing parts)

LSR is especially valuable in regulated industries where reliability and material stability are required.

Is Liquid Silicone Rubber suitable for medical devices?

Yes. Many LSR grades are designed to meet medical requirements and are widely used in regulated applications due to their biocompatibility, sterilization compatibility, and long-term stability. When combined with controlled manufacturing environments and quality systems, LSR is an excellent material for medical device components.

Can LSR be combined with plastic or metal components?

Yes. LSR can be integrated with other materials through advanced manufacturing methods such as:

  • Overmolding
  • Insert molding
  • Two-shot (2K) or multi-shot molding

This enables strong, functional assemblies where silicone is combined with plastics or metals for improved performance and simplified product design.

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