Hebei Shuzhi Rubber Products Co., Ltd.

**Hebei Shuzhi Rubber Products Co., Ltd. - Precision Engineered Sealing & Fluid Transfer Solutions**

### **Core Product Expertise**

As a specialist in high-performance rubber components, we deliver critical solutions for automotive and industrial sectors through five core product lines:

1. **EPDM Automotive Sealing Strips**

Engineered for doors, windows, trunks, and sunroofs, our EPDM seals offer exceptional resistance to UV, ozone, and extreme temperatures (-50° C to +140° C). Features include integrated metal carriers for structural integrity, low compression set (<25%), and customizable surface finishes (smooth/flocked/coated) to reduce friction and noise. Compliant with ISO 4637 and OEM standards like PV 3341.

2. **NBR Foam Sealing Strips**

Designed for oil-rich environments, these closed-cell foam strips serve engine covers, fuel systems, and industrial machinery. With NBR hardness grades from 70A-90A and densities of 150-500 kg/m³ , they provide superior resistance to fuels/solvents (<15% oil swell per ASTM D471), effective vibration damping, and IP67-rated sealing.

3. **EPDM Sponge/Foam Sealing Strips**

Ideal for HVAC, electrical enclosures, and architectural weatherstripping, our microcellular EPDM foam achieves 35-40 dB sound transmission loss (STC) and maintains watertight integrity with 70% compression recovery. Flame-retardant options meet UL94-HB specifications.

4. **Custom Molded Rubber Components**

Utilizing 100-500 ton presses, we manufacture precision O-rings, grommets, vibration mounts, and complex geometries in EPDM, NBR, Silicone, or FKM. Tolerances held within ± 0.1mm (ISO 3302-1) ensure consistent performance in sealing, insulation, and impact absorption applications.

5. **Automotive Water/Coolant Hoses**

Reinforced with 3-4 ply fabric/steel wire, our EPDM hoses withstand burst pressures exceeding 600 kPa and temperatures from -40° C to +150° C. Fully compliant with SAE J20 R6/R7/R9 standards for radiator, heater, and coolant systems in EVs and ICE vehicles.

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### **Manufacturing Excellence**

Our **8 specialized production lines** enable vertical integration from raw material compounding to finished products:

- **4 Continuous EPDM Extrusion Lines** with laser-guided profile control

- **2 Automated Foam Sealing Lines** featuring nitrogen-assisted foaming technology

- **1 High-Capacity Molding Unit** supporting multi-cavity tools

- **1 Braided Hose Line** with mandrel wrapping precision

*Annual Capacity: 14+ million linear meters of seals 500, 000+ molded parts 200, 000+ hose assemblies*

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### **Quality & Certification**

Operating under IATF 16949 and ISO 9001 certifications, we enforce rigorous protocols:

- **Material Validation**: FTIR, DSC, and TGA analysis

- **Performance Testing**: 1, 000-hour salt spray, thermal aging (135° C/168h), fatigue cycling

- **Traceability**: Batch-controlled production with statistical process control (SPC)

- **Compliance**: REACH/RoHS, ASTM, SAE, and ISO standards

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### **Why Choose Shuzhi? **

- **End-to-End Customization**: Profile design (. Dxf/. Dwg support), material compounding (custom hardness/colors/additives), and value-added processing (precision cutting, splicing, packaging)

- **Automotive Focus**: IATF 16949-certified processes with OEM audit experience

- **Global Reach**: Exports to 30+ countries across Europe, Americas, and Asia-Pacific

- **Engineering Partnership**: Collaborative R&D for complex sealing challenges

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**Contact Our Expert Team Today! **