Liquid Silicone Rubber (LSR) Molding
Precision molding for flexible, heat-resistant, and biocompatible silicone parts
We manufacture high-quality LSR components for applications where durability, safety, and performance are critical. From medical-grade seals to waterproof wearables, our process ensures consistent results and faster production cycles.
Get Instant Quote
- 98.5%on-time delivery
- 28M+parts shipped
Trusted by top global brands:
What is Liquid Silicone Rubber (LSR) Molding?
Liquid Silicone Rubber (LSR) molding is an injection molding process where two-part liquid silicone material is mixed, injected into a heated mold, and cured into a flexible, durable, and highly stable part.
This process uses precision dosing and mixing equipment to ensure consistent material properties and enables production of complex geometries with excellent repeatability.
LSR molding is ideal for parts requiring elasticity, chemical resistance, and thermal stability.
From Prototypes to Production
Ezra covers every stage of your product lifecycle, from rapid prototyping to small batches and high volume production, offering an on-demand manufacturing tool, cost-effective solutions, and fast lead times.
Prototyping Injection Molding
Start fast with Ezra’s prototyping services using 3D printing, CNC machining, or soft tooling. Ideal for design validation and functional testing before committing to tooling.
- Quantity: 1-100 pcs
- Lead Time: 1-7 days
- Free Lifetime Tooling Maintenance
- Flexible prototyping with multiple methods
Low Volume Injection Molding
We use aluminum tooling and rapid molding techniques to deliver cost-effective, short-run parts with high precision. Perfect for pilot production or bridging the gap to full-scale manufacturing.
- Quantity: 100–10,000 pcs
- Lead time: 3–5 weeks
High Volume Production
Ezra specializes in high-volume injection molding with low cost and scalable output. We offer over 100+ thermoplastic and thermoset materials, supporting even the most demanding production needs.
- Quantity: 10,000+ pcs
- Lead time: 4–7 weeks
- Competitive pricing for large orders
Where LSR Molding is Used
LSR is chosen for applications that require flexibility, stability, and safety.
Medical Device Components
Seals, valves, and respiratory masks made from medical-grade silicone.
Food-Grade Products
Baby bottle nipples, kitchenware, and seals for food containers.
Automotive Seals & Gaskets
High-performance parts that resist heat and fluids.
Waterproof Wearables
Soft, durable enclosures for electronics.
Keypads & Buttons
Soft-touch, durable input components for electronics.
From First Upload to Final Part
Ezra combines engineering insight, rapid prototyping, and scalable production into one seamless custom injection molding service.
Secure File Handling
We protect your CAD files and drawings with strict confidentiality protocols. From NDA support to access-restricted project views, your intellectual property stays secure throughout the manufacturing process.
- NDA available upon request
- Encrypted file uploads
- Internal-access only policy
Designing for Manufacturability Report
Every project is reviewed by experienced engineers who provide free DFM and Moldflow reports. Get actionable insights to optimize part design before tooling begins.
- DFM + Moldflow review included
- Faster iterations, fewer tooling errors
- Early risk detection
Fast and Flexible Prototyping
Validate designs quickly with our rapid prototyping option, including 3D printing, CNC machining, and soft tooling, to accelerate every stage of the product development cycle.
- 3D print, CNC, or soft mold options
- Lead time as fast as 1–2 weeks
- Small-batch or one-off production
Factory Price at Scale
With in-house tooling and injection molding, we offer unbeatable pricing on high-volume orders. Get consistent quality control and global delivery without the middlemen.
- 100+ plastic material options
- Capacity for 10k+ parts/month
- Lower cost per part with volume
Our LSR Molding Process
Request a Quote & DFM Review
Share your LSR part design, receive a quote in 24h, and get a free DFM analysis.
Mold Design & Flow Simulation
We create your mold design and run mold flow analysis to optimize material flow, cooling, and part quality.
Tooling & T1 Sample
We begin tooling using premium-grade materials. T1 samples are delivered within 2–3 weeks for your inspection and approval.
Low-Volume Production
Once the sample is approved, we move into production — with full traceability, precision machining, and on-site QC inspection.
Final QA & Secure Delivery
Our QC team performs strict final inspections.
Parts are securely packaged and delivered worldwide through trusted logistics partners.
Industries We Serve
EzraMade’s clients come from multiple industries. Whether you produce medical devices, cars, or consumer goods, you'll find us to be a reliable injection molding partner. Our injection molding services are designed for ultimate predictability in costs and quality.
Customer-Authorized Cases
Custom Eyeshadow Palettes
A startup beauty brand used EZRA Made's injection molding. It cut lead times, costs, and improved part quality. EZRA Made did no-MOQ custom molding and rapid prototyping, from CAD to mold. After quick tooling, parts were injected and assembled. This brought fast production and short revision intervals.
Custom Cannabis Pre-Roll Packaging
Dive into our case study on eco-friendly pre-roll tubes for cannabis. Preserve freshness & elevate luxury—contact for custom cannabis packaging today!
Bicycle Bottle Cage Adapter
This custom-designed bottle cage adapter was 3D printed using black Nylon (PA12) via Selective Laser Sintering (SLS). The part showcases a lightweight lattice design optimized for strength and flexibility, ideal for aftermarket bike accessories. The fine surface texture and dimensional stability make it suitable for real-world outdoor use, ensuring reliable grip and performance under load.
Material: PA12 Nylon
Surface: As-printed, matte textured finish
Golf Club Head
This golf club head was part of a prototype project for a new player-focused design. The client sent the CAD file with a lattice-filled cavity. We printed it in stainless steel using DMLS. After two quick iterations, adjusting wall thickness and face weight, it was approved for swing testing. The whole process took under three weeks from file to functional part.
Dual-Shot Molded Counter Housing for Electronic Assembly
This electronic counter features a dual-color injection molded housing with integrated mounting structures for PCB and display components. Designed for handheld use, the part combines aesthetic surface finish with functional rigidity, enabling quick assembly and reliable performance in compact electronics.
Hybrid Globe Assembly with Metal-Plastic Integration
This custom globe combines precision-injected plastic and machined metal parts, with a clean USB-C charging port embedded in the base. The structure is designed for both visual appeal and durability, using multi-material assembly and post-finishing to ensure tight fit, surface alignment, and seamless rotation. A typical application of decorative product manufacturing with functional components.
Metal Home Decor
This piece was printed in stainless steel using DMLS, designed as a decorative object for modern interiors.
Precision CNC-Machined Tumbler for Double-Wall Drinkware
This stainless steel tumbler was CNC machined from dual-layer 304 stainless steel and finished with two distinct textures—satin brushing and snow-like bead blasting. Engineered to maintain consistent wall thickness for insulation and fluid aesthetics, the part showcases both functional precision and poetic design. The open-mouth shape and engraved bird detail reflect the client’s minimalist brand vision rooted in eastern elegance. ——Published with customer permission
Silicone-Overmolded Plastic Jar for Cannabis Packaging
This airtight container integrates a rigid transparent plastic body with a soft-touch silicone overmolded lid, designed for cannabis storage and retail packaging. The playful “drip” visual design is achieved through precision overmolding, ensuring brand recognition while maintaining seal integrity and user-friendly handling.
Aluminum Mounting Kit for Drone Cinematography
This CNC-machined aluminum accessory kit for DJI Mavic 4 Pro includes handheld grips, extension arms, and mounting brackets for professional aerial and handheld shooting. Each part is precisely milled for strength, lightweight handling, and modular compatibility with camera rigs and NATO rail systems. ——Published with customer permission
Anodized Aluminum Clamp for Folding Bike Assembly
This folding bike seat post clamp was CNC machined from aluminum alloy and finished with black anodizing and laser-etched markings. Designed for both durability and aesthetics, it features smooth contours and precision threads for easy locking and long-term outdoor use. ——Published with customer permission
Display Enclosure with Embedded Metal Inserts
This monitor housing was produced using insert molding, integrating metal fasteners directly into the injection-molded plastic shell. The result is a rigid, durable assembly that simplifies downstream installation and improves long-term structural integrity. Ideal for consumer electronics with high-precision assembly needs.
Multi-Tool Blades and Components for Outdoor Use
This stainless steel multi-tool features CNC-machined blades, saws, and pliers with brushed or sandblasted finishes for durability and corrosion resistance. Precision pivots and locking points ensure reliable deployment in camping, automotive, and emergency scenarios. ——Published with customer permission
Your Parts, Our Responsibility
Talk to our injection molding engineers to find out how we can meet your requirements.
Tell us about your project!
LSR Molding FAQs
What’s the difference between LSR molding and conventional silicone molding?
LSR molding uses liquid feedstock and injection, enabling faster cycles and more precision than compression or transfer molding.
Can LSR be colored?
Yes, pigments are mixed in during processing for custom colors.
Is LSR safe for medical applications?
Medical-grade LSR meets ISO 10993 and USP Class VI biocompatibility standards.
What sizes can be produced?
From micro parts under 1g to large seals over 300mm, depending on mold design.
What is the lead time?
Tooling in 2–4 weeks, with production immediately after approval.
