Our Quality Control Process for Automotive Sealing Strips

As a professional automotive sealing supplier, quality control is our core competency. We conduct inspections at every stage of the production process following IATF 16949 automotive standards to ensure every shipment meets your requirements.

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Pre-Production

Raw material verification, sample approval

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In-Process

Dimensional checks, appearance inspection

Pre-Shipment

Final random inspection, packaging check

1. Pre-Production Inspection

Raw Material Verification

  • ✓ Check material certificates (EPDM, PVC, Silicone, etc.)
  • ✓ Verify material hardness, density, and composition
  • ✓ Test samples before mass production begins
  • ✓ Confirm color matching with approved samples

Tooling & Mold Check

  • ✓ Inspect extrusion dies for accuracy
  • ✓ Verify profile dimensions match specifications
  • ✓ Test first articles before full production
Quality Control

2. In-Process Inspection

Quality Control

Dimensional Checks

  • ✓ Profile width, height, thickness
  • ✓ Cross-section accuracy
  • ✓ Length tolerance

Appearance Inspection

  • ✓ Surface smoothness
  • ✓ Color consistency
  • ✓ No bubbles, cracks, or deformities

Performance Tests

  • ✓ Tensile strength
  • ✓ Elongation rate
  • ✓ Hardness (Shore A)
  • ✓ Aging resistance

3. Pre-Shipment Inspection

Final Random Inspection (FRI)

  • ✓ AQL 2.5 standard (or per your requirement)
  • ✓ Random sampling from packed cartons
  • ✓ Full dimensional and appearance check
  • ✓ Function testing (if applicable)

Packaging Verification

  • ✓ Carton strength and labeling
  • ✓ Pallet stacking and securing
  • ✓ Container loading supervision (if needed)

Documentation Review

  • ✓ Commercial Invoice
  • ✓ Packing List
  • ✓ Bill of Lading
  • ✓ Certificate of Origin
  • ✓ Quality Test Reports
Quality Control

Testing Equipment

Our partner factories are equipped with comprehensive testing facilities

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Hardness Tester

Shore A hardness measurement

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Tensile Testing Machine

Tensile strength and elongation

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Aging Test Chamber

Heat aging and weather resistance

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Color Spectrophotometer

Color accuracy verification

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Dimensional Tools

Calipers, projectors, CMM

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Microscope

Surface defect analysis

Automotive Industry Certifications

Our partner factories hold relevant certifications for automotive production

IATF 16949

Automotive Quality Management

International standard for automotive industry. Ensures consistent quality for OEM and aftermarket supply.

ISO 9001:2015

Quality Management System

Ensures consistent quality control processes across all production lines.

ISO 14001

Environmental Management

Commitment to environmentally responsible manufacturing practices.

RoHS / REACH

Product Compliance

Products comply with EU regulations on hazardous substances for automotive applications.

Third-Party Inspection Welcome

We welcome and can arrange independent inspections

SGS
BV
Intertek
TUV

We welcome third-party inspections from:

  • SGS
  • BV (Bureau Veritas)
  • Intertek
  • TUV
  • Or your designated inspection agency

Inspection costs: Buyer's responsibility

Scheduling: Please notify us 3-5 days in advance

Quality Guarantee

📸 Issue Verification

If any quality issues are discovered, please provide photos/videos for verification. We'll respond within 24 hours.

🔄 Resolution

For confirmed quality defects, we offer replacement or refund for the affected products.

📊 Root Cause Analysis

We conduct thorough investigation and implement corrective actions to prevent recurrence.

Have Quality Questions?

Our QC team can answer your specific requirements

Contact Us