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Liquid Silicone Rubber (LSR) Injection Molding 

Injection molding of liquid silicone rubber (LSR) is a process to produce pliable, durable parts in high volume.

Liquid silicone rubber is a high purity platinum cured silicone with low compression set, good stability and ability to resist extreme temperatures of heat and cold ideally suitable for production of parts, where high quality is required. Due to the thermosetting nature of the material, liquid silicone injection molding requires special treatment, such as intensive distributive mixing, while maintaining the material at a low temperature before it is pushed into the heated cavity and vulcanized.

Chemically, silicone rubber is a family of thermoset elastomers that have a backbone of alternating silicon and oxygen atoms and methyl or vinyl side groups. Silicone rubbers constitute about 30% of the silicone family, making them the largest group of that family. Silicone rubbers maintain their mechanical properties over a wide range of temperatures and the presence of methyl-groups in silicone rubbers makes these materials extremely hydrophobic, making them suitable for electrical surface insulations.

Typical applications for liquid silicone rubber are products that require high precision such as seals, sealing membranes, electric connectors, multi-pin connectors, infant products where smooth surfaces are desired, such as bottle nipples, medical applications as well as kitchen goods such as baking pans, spatulas, etc. Often, silicone rubber is overmolded onto other parts made of different plastics. For example, a silicone button face might be overmolded onto a Nylon 6,6 housing.

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Die Cuttings from Maysea

Features of Products

  • Materials

Standard Silicone (30, 40, 50, 60, and 70 durometers)
Medical-Grade Silicone
Optical-Grade Silicone
Fluorosilicone (fuel and oil resistant)


  • Common applications for silicone rubber molding:

low-volume production
bridge tooling
pilot runs
functional prototyping



Liquid Silicone Rubber (LSR) can be processed in a liquid injection molding (LIM) process. The liquid raw material is mixed from two separate components in a ratio of 1:1 and injected via a cold-runner-system into a hot mold. Curing takes place within seconds, offering the advantage of fast cycling and production of large quantities.

Due to the flexibility in design and tooling, LSR injection molding is ideal for producing complex geometries and can consolidate various functional features into a single part. It also offers  significant advantages in terms of product reliability and total cost of ownership.


  • Production Lot Sizes

Maysea support both High Volume and HMLV business model, provide competitive prices.

Lot Size Can be 1 pcs to 1000K pcs

Liquid Silicone Rubber Injection Molding Facility

With years of supply experience in industrial market, Maysea could provide Liquid Silicone Rubber Injection Molding Parts according to your drawings and specifications.
Limitless design – Enables production of part geometries and technical solutions not possible otherwise

Consistent – Provides the highest consistency in product dimension, precision and overall quality

Pure – Silicone is one of the most extensively tested biomaterials with a long history of safe use

Precise – Flashless, wasteless tool design concepts for parts weighing from 0.002 grams to several hundred grams

Reliable – Using the latest technology in machinery, tooling and automation

Quality – Zero-defect quality level through in-process controls

Fast – Enables highest volume production due to short cycle times, from several thousand to millions

Clean – Utilizing state-of-the-art processing techniques and production in Class 7 and 8 cleanrooms

Cost-effective – Offers lowest Total Cost of Ownership (TCO)
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Why Choose Maysea?

Flexible Business Model, Maysea support both High Volume and High Mix Low Volume Business Model. From 1pcs to 100K pcs, we make the parts good and make the delivery fast as expected.
Fast Prototyping Capability, Normally 7 days Lead time for Sample Development . Our project team also provide swift responsiveness on inquiries.
Provide solutions with all Metal or Non-Metal Materials , e.g. Metal: Stainless Steel, Copper & Brass, Aluminum. Non-Metal: Plastics like Peek, POM etc.,
Well-known Branding CNC Machines, Solid Quality Consistency, Reliable QMS, provides Good Quality and Precision Parts in expected Lead times.
Rich experience on secondary treatment of parts, like grinding , Heat treat, anodizing , zinc plating etc., good resources on the up to down industry streams.
Provide Door to Door Logistic Solutions on Sample or Production Orders. 40+ years of international business experience, goods can be shipped to your location within agreed shipping schedule.
Prompt Responsiveness, 24/7 support on inquiries.
RFQ will be quoted within 3 working days .
One-shop stop solution provider, especially when you have complex parts that needs other operations like Grinding, Milling, Anodizing, Heat treat, Assembly etc. Maysea Provides you competitive cost with solid quality .

Maysea Group Inc.

Hong Kong | Shanghai | Suzhou, China

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