Custom Silicone Manufacturing
Silicone Mold Making for Custom LSR and Silicone Parts
We design and build silicone molds for custom liquid silicone rubber (LSR) parts, silicone compression parts, and silicone overmolding programs. If you need a production-ready supplier for RFQ, sample validation, and repeat manufacturing, we help turn your drawing or 3D file into stable, scalable parts.
LSRParts works with OEMs, Tier suppliers, product developers, and engineering teams that need precision silicone components—not standard catalog rubber products. From DFM review and material selection to mold design, sampling, validation, mass production, and final inspection, we support the full path to production.
What We Do
We provide custom silicone mold making and production for demanding applications where dimensional control, sealing performance, and repeatability matter.
LSR Injection Molding
Silicone Compression Molding
LSR Overmolding
Silicone Extrusion
Precision Mold Making
Secondary Operations & Assembly
We build molds and parts around your application requirements, including hardness, tolerance, bonding, color, surface finish, and production volume.
Why Buyers Contact Us
If your program needs any of the following, we are a strong fit:
- Custom drawings or 3D files
- New tooling requirements
- Prototype-to-mass-production development
- DFM support before tooling starts
- Precision or functional sealing requirements
- Annual demand above 100,000 pcs
We are focused on repeat-production silicone components for industrial and regulated applications.
Silicone Mold Making Built for Production
A reliable part starts with a reliable mold. Our engineering team reviews the full part and process before tooling begins, including:
Wall Thickness & Draft
Undercuts & Flash Risk
Sealing Features
Tolerance Stack-up
Material Hardness & Shrinkage
Bonding Requirements
Expected Production Volume
This early review helps reduce tooling risk and improves the path from T0/T1 sampling to stable mass production.
Typical Workflow
Our LSR Molding Capability
We build custom silicone molds for parts that need precision and repeatability.
LSR Injection Molding
- Maximum part envelope
- 300 × 200 × 100 mm
- Silicone hardness
- 10–80 Shore A
- Typical part tolerance
- ±0.05 mm
- Critical tolerance
- down to ±0.02 mm
- Mold manufacturing tolerance
- ±0.01 mm
- Part-to-part repeatability
- approx. ±0.1 mm
- Mold life
- 3–5 million shots
- Tooling options
- Prototype / Production
- Cavities
- Single / Multi-cavity
- Surface
- Custom / Matte / Polished
- Color
- Custom / Pantone matching
- Secondary operations
- Post-curing, trimming, printing, laser marking, bonding, assembly
LSR Overmolding
We support overmolding for parts that combine silicone with plastic or metal substrates.
- Plastic substrates: PC, PA, PBT, PPSU, PPA, PEI, etc.
- Metal substrates: Aluminum, stainless steel, brass, copper
- Bonding strategy: Chemical / mechanical
- Insert molding: Supported
- Typical applications: Medical devices, connectors, seals, grips, electronics
Silicone Compression Molding
For larger or different-geometry silicone parts, we provide compression molding support.
- Maximum size: 2500 × 2000 × 1000 mm
- Typical part tolerance: ±0.2 mm
- Secondary operations: Post-cure, trimming, punching, drilling, printing, bonding, assembly
Silicone Extrusion
We manufacture silicone tubing, cords, strips, and custom profiles.
- Tubing OD: 0.5–120 mm
- Wall thickness: 0.3–15 mm
- Precision cross-section tolerance: ±0.03 mm
- Production volume: Prototype to 1M+ meters/year
- Secondary operations: Cutting, coiling, joining, marking, inspection, packaging
Tooling Capability
Our silicone mold making process is backed by in-house engineering and tooling support.
DFM
Yes
CAD
SolidWorks / CAD
Mold Flow Review
Supported
CNC
3-axis / 5-axis
EDM
Sinker / Wire EDM
Rapid Tooling
Aluminum tooling
Production Tooling
Hardened steel tooling
Common Mold Steel
P20 / NAK80 / H13 / S136 / 420
Lead Times
Prototype tooling
Benchmark 10–12 days
Production tooling
Benchmark 3–6 weeks
Sampling
T0 / T1 / Validation
Materials We Work With
Secondary Operations
We do more than mold the part. We support the finishing steps needed for real production use.
Industries We Serve
We primarily support OEMs and Tier suppliers in demanding industrial and regulated applications.
Automotive & EV
Connector seals, wire seals, battery seals, sensor seals
Medical & Healthcare
Septa, plunger tips, valves, diaphragms, tubing, device seals
Pumps, Valves & Fluid Control
Diaphragms, membranes, check valves, sealing components
Electronics & Sensors
Waterproof seals, housing seals, keypads, overmolded parts
Food, Beverage & Baby Care
Bottle valves, breast pump parts, food-grade seals and tubing
Why LSRParts
Customers choose us when they need a silicone mold making partner who can manage the entire production path.
- ✓ Custom parts built to drawing and application requirements
- ✓ Engineering review before tooling starts
- ✓ Production-focused process control
- ✓ Precision tolerances and repeatability
- ✓ Support from prototype to mass production
- ✓ Secondary operations under one roof
- ✓ Experience with demanding industrial and regulated applications
We do not focus on low-value commodity parts. We focus on custom, repeat-production silicone components where performance matters.
Production-Ready Partnership
From DFM review to mass production and final inspection, we manage the complete path to production for precision silicone components.
±0.02 mm
Critical Tolerance
3–5M
Mold Life (Shots)
10–12
Prototype Tooling Days
1M+
Extrusion Meters/Year
Request a Quote
If you need silicone mold making for a new part program, send us your drawing, 3D file, target material, annual volume, and key performance requirements. We will review manufacturability, recommend the right process, and support your RFQ with a practical production plan.
What to include in your RFQ:
- • Drawing or 3D file (STEP, IGES, or native CAD)
- • Target material and hardness
- • Annual volume and production timeline
- • Key performance requirements
Contact LSRParts to start your RFQ for custom silicone molds and production-ready silicone parts.