About Hongjie Seal
Since 2001, HONGJIE has specialized in the manufacturing of rubber O-rings, seals, washers, diaphragms, grommets, and custom molded rubber components for industrial and OEM applications worldwide.
Start Project Discussion
25+
YEARS OF EXCELLENCE
Who We Are
Leading Manufacturer for High-Performance Seals
HONGJIE was established in 2001, with an 11,000 square meters facility and existing 150 employees. We offer a wide selection of industrial rubber components such as rubber o-rings, backup-rings, washers, diaphragms, grommets and custom molded seals by injection molding, compression molding, and die-cutting. All rubber products are strictly controlled in each process.
- IATF16949:2016 Certified
- ISO13485:2016 Certified
- FDA & NSF Compliant
- 3,500+ Standard Profiles
- Export to 45+ Countries
Our Journey
Building Reliable Rubber Manufacturing Since 2001
From rubber O-rings to custom molded sealing components, Hongjie continues to expand its manufacturing capabilities, quality control, and global industry support.
Manufacturing Capabilities
Rubber Manufacturing Processes for Industrial Applications
HONGJIE combines rubber molding experience with scalable production capability to support both prototype and mass production requirements.
-
Injection Molding
Rubber injection molding for precision O-rings, seals, grommets, and custom molded rubber parts using multiple rubber compounds.
-
Compression Molding
Compression molding solutions for rubber washers, diaphragms, thick-wall seals, and large rubber components.
-
Die Cutting
Die-cut rubber washers, flat gaskets, rubber discs, and diaphragm components for sealing and insulation applications.
-
Rubber Material Support
Material options include NBR, EPDM, FKM, HNBR, Silicone, Fluorosilicone, Neoprene, SBR, ACM, and AEM compounds.
-
Quality Inspection
Production inspection includes dimensional checking, hardness testing, appearance inspection, and material control throughout manufacturing.
-
Prototype Support
Engineering support for custom drawings, sample development, and rapid prototype production for OEM sealing projects.
Inside Our Facility
Direct from the Factory
Take a closer look inside our rubber manufacturing facility, where molding, inspection, and production processes support industrial sealing applications worldwide.
-
3,500+
Standard Profiles
-
11,000m²
Own Factory
-
50M+
Parts Delivered
-
C=0
Defect Standard
Quality Assurance
Quality Systems & Material Compliance
HONGJIE follows standardized production management and quality control processes to support stable rubber product manufacturing for industrial applications.
-
IATF 16949:2016
Automotive and industrial rubber component production control
-
UL Certified
Underwriters Laboratories safety certification for electrical applications
-
NSF Certified
National Sanitation Foundation approval for drinking water contact materials
-
WRAS Approved
Water Regulations Advisory Scheme for UK & European water industry compliance
Why HONGJIE
Your Trusted Partner for Critical Sealing
HONGJIE supports OEM and industrial customers with flexible manufacturing capability, custom rubber molding support, and stable production management.
-
Fast Turnaround Times
Prototypes in 5–7 days. Production runs shipped within 15–20 business days. Emergency orders available for critical timelines.
-
Zero-Defect Quality Standard
100% inspection on critical dimensions. Statistical process control (SPC) on every production run. C=0 acceptance sampling plans.
99.7%
ON-TIME DELIVERY
