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Your Trusted Manufacturing Partner
for waterproof and airtight zippers

The 737 ® emerged from a relentless pursuit of innovation in hermetic sealing technology. With ​​over 20 years of specialized expertise​​, we have established ourselves as a premier manufacturer of TPU-coated waterproof and airtight zippers​​ engineered for extreme environments. Our capabilities are anchored by an independent R&D center that has secured ​​30+ utility patents​​ in hermetic engineering, alongside ​​fully automated production lines​​ certified to ISO 9001:2015 standards. This technological infrastructure empowers us to deliver ​​IPX5 to IPX8 graded sealing solutions​​, precisely engineered to fulfill diverse waterproofing demands — from daily-use to aerospace.

Product Center
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Our Advantages
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Specialized Engineering & Innovation:

Advancing Sealing Science


With 20+ years of focused R&D in hermetic engineering, we pioneer sealing solutions through 30+ utility patents covering Dual- Track compression systems and cryogenic-flex TPU formulations.


Our expertise in medical-grade airtight mechanisms enables solving extreme challenges—from deep-sea pressure isolation (5m/72hr IPX8) to aerospace cryogenic environments (-30°C). We set industry trends by transforming sealing technology from passive components to engineered safety systems.

Vertical Integration & Quality Control:

Precision-Driven Manufacturing


Our ISO 9001:2015-certified integrated facility controls 100% of production stages—from in-house TPU synthesis to final pressure validation—ensuring military-grade consistency. Proprietary automated lines guarantee:


•Supply chain resilience: 50% faster lead times vs. industry average (e.g., 72hr rush orders)

•Custom agility: 500 MOQ support for specialized configurations. Partners gain direct engineering access for real-time DFM optimization, eliminating communication barriers.

Performance Proven by Data:

Quantifiable Reliability


We validate superiority through third-party audited metrics exceeding global standards:


• Strength: 970N transverse tensile (38% > IPX5 compliance)
• Durability: 2,000+ reciprocating cycles (2× ASTM D2061)
• Environmental resilience: Zero delamination after -30°C/100°C thermal shock test reports (SGS/REACH) and material traceability
• Certificates: Download from our website or contact customer service.

Simple 4 Steps: Find The Perfect Zipper


Technical Consultation
Share your project vision with 737's technical experts. We provide in-depth analysis of your application's specific requirements, delivering precise recommendations for the optimal ZIZIP waterproof and airtight zipper, perfectly aligned with your performance and design imperatives.
Sample Assessment
Experience our superior engineering firsthand. We offer free samples for comprehensive physical evaluation and prototyping, enabling you to rigorously assess the exceptional quality, enduring durability, and precise performance of our zippers prior to full-scale commitment.
Custom Solution
Collaborate with our experienced engineers to define bespoke zipper specifications. We meticulously adapt length, color, puller aesthetics, and all technical specifications, delivering a detailed and optimized solution for your final approval before initiating production.
Production & Delivery
Upon your confirmed approval, your custom order seamlessly integrates into our efficient production line. We commit to manufacturing superior quality zippers and ensuring consistent, on-time delivery, thereby safeguarding your project timeline and operational continuity.
Our Certification
- Continuous innovation inspires us to strive for excellence-