Custom Liquid Silicone Rubber (LSR) Molding Services
Precision LSR and liquid silicone injection molding for high-value medical, VR, and wearable accessories. Flash-free quality in our ISO Class 8 cleanroom.
Engineered for High-Value, High-Performance Accessories
LSR carries a material premium over standard plastics — which is exactly why it’s the right choice for accessories retailing above $30, where failure isn’t an option.
Biocompatibility
Non-toxic, hypoallergenic material that meets the demands of premium smartwatch bands, CPAP masks, and long-term skin-contact accessories.
Extreme Durability
Retains physical performance from -65°C to 200°C, with strong resistance to aging and UV exposure.
IP68 Sealing & Waterproofing
Compression set far below standard TPU/TPE, delivering a lasting waterproof seal for precision instruments.
De-Risk Your LSR Project with Flexible Supply Chain Terms
Agile MOQ & Scaling
Skip the tens-of-thousands minimum most LSR factories require. Start with a 1,000-piece pilot run and scale smoothly into mass production.
Transparent Tooling Ownership
Once tooling is paid in full, you own 100% of the mold — with free maintenance across its 300,000–500,000-shot lifecycle.
Flexible Payment & Terms
Choose EXW or DDP delivery, with Net 30 terms available for established customers.
Avoid Costly Mistakes: Our LSR DFM Process
Every quote starts with a Design for Manufacturability review. Here’s where most first-time LSR projects go wrong — and how we fix it before tooling begins.
.STL files
Mesh-based files carry no solid manufacturing data — they can’t be used for mold flow analysis.
.STEP, .STP, or .X_T
Full solid geometry lets our engineers run precise mold flow and shrinkage analysis.
Abrupt transitions
Sudden thick-to-thin transitions trap air and cause flash at the parting line.
Walls down to 0.2mm
LSR allows extremely thin walls when transitions are gradual and vents are placed correctly.
Sliders for every undercut
Defaulting to complex slide/lifter tooling adds unnecessary cost and lead time.
Elastic deflection molding
LSR’s elasticity lets many undercuts release directly from a simpler mold, cutting tooling cost.
Advanced Liquid Silicone Injection Molding
Core ServiceLSR Overmolding
LSR chemically bonds to PPS, PC, or metal inserts for a seamless, adhesive-free waterproof seal — our specialty for AR/VR structural parts and premium electronics enclosures.
Micro LSR Molding
Precision molding of extremely low-weight parts, from earbud acoustic seals to medical-grade micro valves.
ISO-Certified Quality & Zero-Flash Guarantee
ISO Class 8 Cleanroom
Molding and assembly run under controlled particulate conditions, purpose-built for medical devices and skin-contact wearables.
Precision Tooling
In-house high-precision CNC and mirror-finish EDM hold parting-line tolerances within ±0.01mm — the foundation of zero-flash LSR parts with no manual deflashing.
Testing Equipment
Every mold and production run is backed by full dimensional and material data reports:
- 2D Optical Comparator
- Tensile & Tear Testing
- High/Low Temp Aging
- CMM Dimensional Reports
Frequently Asked Questions About LSR
LSR tooling costs more because it’s a thermoset material that requires a precision cold-runner system, cartridge heaters, and extremely tight anti-flash tolerances. In return, you get near-100% yield with no flash and no secondary assembly — the total cost per finished part is often lower than standard injection molding.
Yes, always. We sign a mutual NDA — including one you provide — before reviewing any 3D files or design details.
Yes. Our mold bases are engineered for startups to scale from a pilot run to a full production lifecycle of 300,000–500,000 shots, with free maintenance included throughout.