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Rubber Parts Manufacturer

Hongjie Sealing Technology molds, extrudes, bonds, and die-cuts rubber and silicone parts to OEM drawings. Our Shenzhen facility has operated since 2001 and draws on 3,500+ existing tools and standard profiles. These resources help many orders avoid new mold costs and start production faster. Finished parts are exported to 45+ countries.

Products

Custom Rubber Products We Manufacture

Twelve product lines run through the same certified tooling, molding, and inspection process:

Service

Full-Service Custom Rubber Parts Manufacturer

  • Facility

    An 11,000 m² production facility supported by roughly 150 employees.

  • Engineering

    A 25-engineer design team with access to more than 200 proprietary rubber compounds.

  • Certifications

    IATF 16949:2016, ISO 13485:2016, and UL certification, with FDA/NSF-compliant material options.

  • Production capacity

    More than 50 million precision-inspected parts supplied each year to global Tier-1 suppliers.

Capabilities

Manufacturing Capabilities

  • Molding

    Injection molding and compression molding for custom rubber parts in different volumes, geometries, and cross-sections.

  • Profile and sheet processing

    Extrusion, die-cutting, water-jet cutting, PSA lamination, and kiss-cutting.

  • Assembly and fulfillment

    Rubber-to-metal bonding and export-ready kitting for finished assemblies.

Injection molding suits high-cavity, tight-tolerance parts produced in volume. Compression molding is often more suitable for lower volumes or thick cross-sections when tooling cost needs to stay controlled.

The choice affects piece price, cavity count, and lead time. Our injection and compression molding guide explains how wall thickness and order volume influence the decision.

Parts that need a metal carrier or mounting stud are vulcanized directly onto a pre-treated insert during molding instead of being bonded afterward.

99.7%

ON-TIME DELIVERY

Compounds

Materials & Compound Range

Available compounds include:

  • NBR, EPDM, silicone (VMQ), and HNBR
  • FKM/FFKM, fluorosilicone, neoprene (CR), and SBR
  • Polyurethane, VAMAC, XNBR, and ACM

Temperature ratings range from –60°C to +325°C, with testing against more than 500 fluids and chemicals.

EPDM resists ozone and continuous steam exposure better than NBR, making EPDM rubber gaskets a practical starting point for outdoor enclosures and washdown equipment. Silicone covers a wide temperature range, while FKM/FFKM can extend service life where fuels or aggressive chemicals are present.

Precision Engineering & Quality Control

Dimensional control runs on two tiers, standard and precision, with the tightest tier holding to ±0.02mm on small features:

Dimension Range Standard Precision
0–10mm ±0.10mm ±0.02mm
10–25mm ±0.15mm ±0.05mm
25–50mm ±0.20mm ±0.08mm
50–100mm ±0.25mm ±0.10mm

Production targets Cpk > 1.33 under SPC and Six Sigma monitoring, backed by IATF 16949, ISO 13485, UL, FDA, and NSF compliance. Pick the tolerance tier the assembly actually needs, not the tightest one available — rubber shifts more across cure and post-shrink than metal or plastic, so an oversized tolerance budget just adds inspection cost without improving fit.

PRODUCTION

Tooling, Prototyping & Lead Times

Automotive diaphragm programs requiring PPAP documentation use the tooling validated during prototyping. This helps maintain the approved geometry through volume production without a separate re-tooling step.

  • 1

    Existing Tooling

    More than 3,500 profiles are available, allowing many suitable parts to move directly into sampling without new-mold development.

  • 2

    New Prototypes

    Engineers work from 3D CAD and FEA models in STEP or IGES format. Functional prototypes typically take 3–5 business days.

  • 3

    MOQ and Tooling Costs

    Costs scale with cavity count and part complexity. Single-cavity die-cut parts sit at the low end, while multi-cavity injection-molded assemblies with metal inserts sit at the high end.

  • 4

    Production lead time

    Lead time increases with cavity count and order volume after design sign-off.

Industries Served

Parts ship into automotive, medical, appliance, hydraulic, and general industrial programs, with a smaller volume of aerospace work. Certification and compound selection are matched to the sector — FDA/NSF materials for medical and food-adjacent parts, oil- and fuel-resistant compounds for hydraulic and automotive sealing.

One limitation worth flagging before sending a drawing: Hongjie molds, extrudes, bonds, and die-cuts rubber and silicone components only. Metal-only stampings, plastic-only housings, and hardware outside a rubber-to-metal bonded assembly fall outside what gets manufactured here.

Vibration-isolation and mounting applications are handled under custom rubber bushings.

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