Top 10 silicone manufacturers/ suppliers in china

How to Choose a Silicone Manufacturer in China for Custom Projects

China is one of the world's largest sources for custom silicone parts, from liquid silicone rubber (LSR) injection molding to overmolding and precision sealing components. For overseas buyers, engineers and product teams, the challenge is not finding a factory — it's choosing one that fits your project's process, quality and scale requirements. This guide covers what to evaluate, and what to ask, before you commit tooling or production to a silicone manufacturer.

Key Manufacturing Capabilities to Evaluate

LSR Injection Molding

Liquid silicone rubber injection molding is the core process for high-precision, high-volume silicone parts. Confirm the supplier's experience with LSR tooling and multi-cavity molds, which directly affect unit cost at scale.

Silicone Overmolding

Overmolding bonds silicone to another substrate — plastic, metal, or FPC (flexible printed circuit). Ask whether the supplier has proven overmolding capability and can manage adhesion, tolerance and sealing requirements.

Compression Molding

For lower-volume or larger parts, compression molding can be more economical. Confirm whether the supplier offers both injection and compression options so the process matches your part geometry and volume.

Tooling & DFM

Tooling decides part quality and unit cost. A good supplier provides a DFM (design for manufacturability) review before cutting steel — flagging draft angles, undercuts, wall thickness and gate placement.

OEM / ODM

If you have drawings, the supplier should quote from your files. If you only have a concept or a sample, they should help with measurement and design. Clarify which model you need before requesting a quote.

Questions to Ask Before You Commit

• Can you provide a DFM report before tooling?
• What is your sample lead time, and your mass-production lead time?
• Do you have experience in my industry — medical, automotive, or consumer electronics?
• What materials do you work with — LSR, solid silicone, medical or food grade?
• How do you handle quality control and testing?
• Can you take a project from prototype through to mass production?

From Prototype to Mass Production

A reliable partner carries a project end to end: prototype samples for validation, tooling refinement, pilot runs, and stable mass production — with consistent quality from first article to final shipment.

SiliconePlus Manufacturing Capabilities

SiliconePlus specializes in LSR injection molding and silicone overmolding (over plastic, metal and FPC), plus precision silicone parts and sealing components. We support OEM/ODM projects with tooling and DFM, from prototype to mass production.

If you have a drawing or 3D file, send it over for a DFM report and a quote. If you only have a sample or an idea, our team can help with measurement, design and development.