Custom Silicone & Rubber Parts Manufacturer
From your STEP file to first samples in 20 days. DFM review within 24 hours. No catalog, no MOQ.
- Manufacturing since 2005, 15,000 m² Dongguan facility
- ISO 9001, ISO 14001, ISO 45001 certified
- Compression, Overmolding, LSR, extrusion, CNC in-house
- Tolerances to ±0.2mm, Shore A 10 to 80
Four Things Our Engineers Watch on Every Project
Most silicone projects fail in the same four places.
How our DFM and engineering process works
- Dimensional drift. Every batch is inspected against CAD nominal before it ships. Shore A verified per ASTM D2240 on every lot.
- Material consistency. Every incoming raw material lot is tested before it enters production.
- Communication gaps. Your project engineer answers within one business day, flags risk during DFM, and sends batch records with every shipment.
- Schedule slippage. Production slots are confirmed after DFM approval. Ship date is in writing before tooling begins.
Custom Silicone Applications & Case Studies
A few of the parts we've made, from industrial sealing components to consumer goods. If you don't see your application, reach out. Chances are we've made something similar.
Silicone Sealing Parts
INDUSTRIAL
Seals, gaskets, washers, and stoppers for engines, compressors, and mechanical systems.
Solution
Compression molded silicone, custom formulated for chemical resistance and high-heat environments.
Petrochemical-Resistant Enclosures
INDUSTRIAL
Enclosures resistant to oils, fuels, and harsh chemicals for heavy industrial environments.
Solution
Compression molded fluorosilicone compound, engineered for chemical degradation resistance.
Heavy Industry Components
HEAVY INDUSTRY
Gears, bearings, tires, pumps, and gaskets for heavy-duty machinery and harsh environments.
Solution
Compression molded silicone rubber, engineered for extreme pressure and high-temperature use.
Reinforced Silicone Washers
HEAVY INDUSTRY
Custom washers compounded with PEEK and PTFE for high-load, high-creep environments.
Solution
Compression molded silicone with PEEK/PTFE compound, ±2mm tolerance, custom formulated per application.
Metal-Bonded Silicone Diaphragms
INDUSTRIAL / PRESSURE CONTROL
Custom flat, dished, rolling, and convoluted diaphragms for sealing and pressure isolation.
Solution
Overmolded onto stainless steel, ±0.2mm tolerance, Shore A 20 to 90, 15-day tooling lead time.
See something close to your application?
What Ships With Your Order
The parts arrive. So does the paperwork your QA team needs to approve them.
Full testing and compliance methods
- Certificate of Conformance and Certificate of Analysis on request
- Material lot numbers tracked from incoming inspection to packing list
- Per-batch dimensional reports against CAD nominal
- PPAP Level 3 package available for automotive programs
- Packing list, commercial invoice, HS codes, certificate of origin
- Ship date confirmed in writing before tooling begins
Silicone and Rubber Materials
Materials are sourced from global suppliers including Elkem, Dow, and DuPont, plus qualified Chinese (local) partners selected for the application. Every incoming lot is tested before production.
For overmolding and assembly projects, we coordinate sourcing of plastic substrates, metal inserts, PCBs, LEDs, and other components through vetted partners. You can also supply these directly. Either approach works.
Silicone Grades
- Medical grade / USP Class VI, ISO 10993, full lot traceability
- Food grade, FDA 21 CFR 177,2600, LFGB
- LSR (Liquid Silicone Rubber), platinum-cured, biocompatible
- Standard HTV, peroxide-cured, Shore A 20 to 80
- Fluorosilicone (FVMQ), fuel and oil resistance
- Conductive silicone, EMI/RFI shielding 40 to 80 dB at 1 GHz
- Transparent silicone, up to 95% light transmission
- Thermally conductive silicone, 0.5 to 5 W/m·K, alumina or boron nitride filled
Rubber Compounds
- FKM, fuel, oil, high temperature to +250°C
- EPDM, outdoor weathering, ozone, hot water and steam
- NBR, oil and fuel sealing, -55°C to +130°C
- HNBR, oil resistance at higher temperature than NBR
- FVMQ, low-temperature flexibility with oil resistance
- CR, CSM, IIR, NR and 26 further compounds on request
Manufacturing Methods and Industries We Partner With
How We Make It
The process is selected during the DFM review, based on your part geometry, material, volume, budget, and tolerance.
- Silicone compression molding
- Liquid silicone injection molding
- Silicone rubber extrusion
- Silicone overmolding on metal and plastic
Industries We Serve
Custom silicone parts for medical devices, automotive seals and gaskets, electronics and consumer technology, laboratory equipment, industrial sealing, and food-contact applications. Each program is tooled, molded, and inspected to the documentation that industry requires.
How It Works: From Design to Custom Silicone Parts
We partner with brands and individuals to turn concepts into precise silicone components. Here is how the process works from first contact to finished product.
1. Design Input
Every project begins with a clear understanding of the part's function and requirements. Our engineering team reviews your files within 24 hours and confirms the next steps.
- CAD files (STEP, IGES, STL)
- 2D drawings with key dimensions
- Material requirements
- Surface and texture specifications
- Color requirements
- Functional and use-case info
2. DFM Review
We evaluate your design for silicone manufacturability. If adjustments are recommended, they are documented and confirmed to ensure tooling accuracy.
- Wall thickness and draft analysis
- Parting line, vent, and gate planning
- Shrink rate considerations
- Tooling feasibility checks
- Risk points and suggested improvements
3. Tooling (Mold Fabrication)
Once the design is approved, we build precision tooling using CNC machining or EDM. Every mold is checked against the CAD model before sampling begins.
- CNC-machined aluminum or steel molds
- EDM for fine or complex features
- Surface finishing to required texture
- Dimensional verification
4. Molding and Quality Control
Production begins with validated tooling. Each batch is monitored for consistency, and every shipment passes dimensional and cosmetic inspection before release.
- Silicone compounds mixed to spec
- Molding at set temperature and pressure
- QC checks for dimensions, defects, hardness
- Packing, labeling, and shipping
Before You Send a File
Do you have an MOQ, and what drives the price?
No MOQ. Order one piece for a prototype or a million for a production program. We support startups testing the market, R&D teams iterating on a design, and OEMs running long production.
Five factors drive the price on any project: part geometry (cavity count and mold complexity), tolerance class, material grade, secondary operations (post-curing, printing, assembly, adhesive backing), and certifications (PPAP, ISO 10993, per-lot testing). Most quotes return within 24 hours, once the DFM passes.
Will you sign an NDA before I share files?
Yes. Either send your NDA or use ours. We don't run a parts catalog, sell competing products, or reuse client designs. Files are handled with restricted internal access and kept only as long as the project requires.
What is the lead time for a prototype?
Aluminum soft tooling: 10 to 15 days for the mold, 1 to 3 days for first samples. Steel production tooling: 10 to 20 days for the mold, 1 to 3 days for sampling, then production scales with quantity. Shipping adds 3 to 5 days by air or 25 to 35 days by sea.
Who is my project contact, and in what language?
A dedicated project engineer handles each order from first file to final shipment. English communication by email, WhatsApp, or video call. Business hours 9:00 to 18:00 UTC+8, with overlap to US morning and European afternoon. Urgent messages outside hours answered within 12 hours.
What are your payment terms?
50% deposit after DFM and quote approval, 50% balance before shipment. Net 30 available for established accounts after the first two orders. USD, EUR, and CNY by bank wire. Letters of credit accepted for orders over USD 50,000.
What shipping terms do you support?
FOB Shenzhen or Yantian by default. EXW Dongguan, CIF, and DDP available on request. Air express 3 to 5 days via DHL, FedEx, or UPS. Sea freight 25 to 35 days. Export paperwork includes commercial invoice, packing list, HS codes, and certificate of origin.
What happens if a batch fails inspection?
Send photos and dimensional data within 30 days of receipt. We review batch records, reproduce the issue in-house where possible, and replace defective units on the next run at no charge. Replacement shipping is on us. Root cause is documented in a written corrective action report.
Why Clients Trust Dabojin With Their Silicone Projects
Quoted with client permission. Names and product photos are withheld at their request.
Helped us move from early sketches to validated silicone parts in weeks, not months.
Product Manager, MedTech startup
Tolerance control and documentation made internal reviews and regulatory steps much easier.
Lead Engineer, Bio-engineering firm
Reliable lead times and consistent quality across orders.
Operations Director, Consumer brand
Responsive support through design review and small-batch samples.
Founder, Robotics company
QC reporting and batch records gave stakeholders confidence in each shipment.
Quality Manager, Industrial OEM
Clear, fast communication when requirements changed.
Purchasing, Automotive supplier
Applications and Case Studies
Select a category to explore examples, design notes, and manufacturing considerations.