Explore our engineering-grade sealing profiles manufactured using dense EPDM, micro-cellular sponge rubber, metal core composites, and high-purity silicone formulations.
Zhejiang Haala Automotive Parts Co., Ltd. stands as a premier specialized OEM/ODM enterprise integrating advanced polymer R&D, custom tool engineering, continuous vulcanization manufacturing, and global supply chain logistics. Operating from the industrial core of Qinghe County, China, our enterprise focuses on high-performance elastomeric dynamic sealing systems designed for Tier-1 automotive assemblers, commercial vehicle manufacturers, electric vehicle (EV) OEMs, and demanding heavy industrial applications.
Backed by over a decade of continuous extrusion refinement, our facility houses continuous continuous microwave vulcanization lines, flat vulcanization presses, precision CNC metal tooling centers, and automated laser dimension verification systems. We manage the entire product lifecycle from raw material elastomer compounding (EPDM, Silicone, TPV, PVC, CR) to tooling design, sample validation under PPAP Level 3, and mass volume extrusion.
Modern automotive weatherstripping requires a comprehensive balance between low compression set, long-term elastic recovery, severe ambient UV degradation resistance, and extreme thermal resilience. Our material laboratory engineers proprietary compound formulations engineered to withstand operational environments ranging from extreme sub-zero cold (-40°C) to intense continuous thermal loading (+150°C).
Ethylene Propylene Diene Monomer (EPDM) remains the gold standard for body sealing. We produce dual-durometer and tri-extrusion profiles featuring a rigid backbone (70-80 Shore A), a micro-cellular sponge sealing bulb (0.4-0.6 g/cm³ density), and embedded embedded steel wire or stamped steel carrier cores for vibration-resistant mechanical retention.
For high thermal loading zones—such as turbocharger intake ducting, sunroof perimeter sealing, and EV battery thermal barrier interfaces—our silicone strips offer exceptional resistance to heat up to +220°C, chemical inertness, low compression fatigue, and biological inertness with high optical clarity options.
Offering 100% recyclability and weight reduction advantages over traditional vulcanized rubber, our TPV/TPE dynamic sealing profiles feature low coefficient of friction (CoF) slip-coatings, excellent flex fatigue endurance, and seamless thermal welding capabilities for corner joints.
The shift toward New Energy Vehicles (NEVs) and Autonomous Driving has redefined automotive sealing requirements. Without internal combustion engine noise masking external sounds, Noise, Vibration, and Harshness (NVH) attenuation becomes critical. Furthermore, EV battery pack enclosures require absolute IP67/IP68 liquid sealing and flame-retardant barriers.
We manufacture UL 94 V-0 flame-retardant rubber gaskets, self-adhesive silicone sponge strips, and closed-cell EPDM seals specifically tailored for battery pack top-cover sealing. These profiles maintain structural integrity under high pressure, prevent humidity ingress, isolate high-voltage modules, and mitigate thermal runaway propagation across cells.
Our multi-lip secondary door weatherstrips, glass run channels with flocking finishes, and D-shape/P-shape foam seal strips significantly drop airborne noise index (Db) levels. By engineering multi-hollow internal chambers within the sponge structure, our profiles absorb high-frequency wind noise and road rumbling at high highway cruising speeds.
Operating within the world-renowned Qinghe automotive components hub, Zhejiang Haala leverages a deeply integrated, end-to-end industrial ecosystem. By combining raw elastomer synthesis, custom precision mold fabrication, microwave extrusion curing, and automated quality auditing under a single roof, we eliminate intermediate supply chain delays and reduce overall manufacturing lead times by up to 35%.
Our fully automated extrusion lines handle dense rubber extrusion, micro-sponge foaming, embedded steel mesh insertion, slip-coat spraying, corner vulcanization welding, and inline tape application seamlessly.
Every batch undergoes rigorous quality control using optical profile projectors, rheometers, compression set fixtures, ozone exposure chambers, weatherometers, and tensile testing apparatus.
Our high-performance seals are exported worldwide to Germany, the United States, Japan, France, Australia, Türkiye, India, Brazil, Russia, Iran, Nigeria, and beyond with complete export packaging compliance.
Automotive original equipment procurement demands strict adherence to rigorous quality standards and environmental regulations. Zhejiang Haala maintains complete transparency and full traceability throughout our production lifecycle, fully compliant with Tier-1 and OEM audit protocols.
| Certification / Standard | Compliance Scope & Description | Target Automotive Application |
|---|---|---|
| IATF 16949:2016 | Automotive Quality Management System compliance, covering defect prevention and variation reduction. | All Primary & Secondary OEM Vehicle Seals |
| ISO 9001:2015 | Quality management systems across design, engineering tooling, raw material compounding, and extrusion. | Industrial, Commercial & Architectural Seals |
| REACH & RoHS Directives | Strict restriction of hazardous substances, heavy metals, phthalates, and SVHC chemicals. | Passenger Cabin Interior & Exterior Seals |
| UL 94 V-0 / Flame Retardant | Self-extinguishing rubber & silicone compound testing for electrical safety under elevated thermal stress. | EV Battery Packs & Electrical Enclosures |
| VDA 6.3 Audit Ready | Process audit standard established by the German Automotive Industry Association for operational excellence. | European OEM Automotive Platforms |
Below is a detailed engineering comparison of our physical material properties designed to assist automotive procurement engineers and component designers in selecting optimal compounds for customized seal profiles.
| Physical Parameter | Dense EPDM Seal | EPDM Sponge Seal | Silicone Polymer Seal | Modified TPV Profile |
|---|---|---|---|---|
| Hardness Range (Shore A) | 40 to 90 Shore A | 15 to 35 Shore A (Equivalent) | 30 to 80 Shore A | 55 to 85 Shore A |
| Density (g/cm³) | 1.20 - 1.40 | 0.45 - 0.70 | 1.15 - 1.25 | 0.95 - 1.05 |
| Tensile Strength (MPa) | ≥ 10.5 MPa | ≥ 2.5 MPa | ≥ 8.5 MPa | ≥ 12.0 MPa |
| Elongation at Break (%) | ≥ 300% | ≥ 200% | ≥ 400% | ≥ 350% |
| Compression Set (70°C / 22h) | ≤ 25% | ≤ 30% | ≤ 18% | ≤ 32% |
| Working Temperature Range | -40°C to +125°C | -40°C to +120°C | -60°C to +220°C | -40°C to +135°C |
| UV & Ozone Resistance | Excellent (50pphm / 100h) | Excellent | Outstanding | Very Good |
To bridge the gap between initial CAD concept design and final high-volume extrusion production, Zhejiang Haala offers complete co-engineering assistance. Our dedicated engineering team works directly with client CAD teams (STEP/IGES/DWG formats) to perform Design for Manufacturability (DFM) reviews, optimize insertion forces, and refine compression deflection rates.
Using in-house EDM wire cutting and CNC machining, custom profile extrusion dies can be fabricated within 7 to 10 working days, providing physical sample extrusions for rapid fit-and-function validation.
We provide automated online application of high-tack Pressure Sensitive Adhesives (PSA), including authentic 3M acrylic foam tapes, heat-activated tapes (HATM), and wire-reinforced carrier backing.
For window glass sliding grooves and sunroof perimeter seals, we apply electrostatic velvet flocking or spray-cured polyurethane slip coatings to eliminate glass drag, squeak noise, and friction wear.
As global automotive OEMs pledge carbon-neutral supply chains by 2030 and 2050, Zhejiang Haala is actively leading green elastomer innovation. Our R&D center is introducing sustainable manufacturing methodologies designed to lower carbon footprint without compromising mechanical performance.
We are integrating bio-derived ethylene monomers sourced from sugarcane ethanol into our EPDM formulations, achieving up to 50% bio-based carbon content. Additionally, our recyclable TPV series enables closed-loop scrap recycling, reducing landfill waste to absolute zero.
By combining advanced finite element analysis (FEA) cross-sectional modeling with micro-cellular foaming technology, we engineered next-generation light-weight weatherstripping profiles that reduce strip linear weight by 15-20%, directly supporting EV range extension and vehicle curb-weight reduction targets.
Find technical answers regarding custom tool engineering, durometer selections, minimum order quantities (MOQ), global compliance, and PPAP submission timelines.
For custom automotive rubber profiles, initial tooling design and wire-EDM die fabrication require 7 to 10 calendar days. First article samples (FAS) along with complete PPAP Level 3 documentation (dimensional layout, material test reports, process flow charts, PFMEA) are typically submitted within 14 working days post-tooling approval.
We utilize advanced co-extrusion cross-heads linked to multiple continuous extruders. This allows us to bond dense EPDM (for channel gripping), micro-cellular EPDM sponge (for soft sealing), embedded metal clips or wire cores (for mechanical clamping force), and protective low-friction slip coatings in a single uninterrupted extrusion pass.
Our extrusion lines accommodate solid dense rubber formulations from 40 Shore A (very flexible) up to 90 Shore A (rigid plastics-like feel). Micro-cellular sponge rubber densities can be calibrated from 0.40 g/cm³ up to 0.85 g/cm³ depending on required closure force parameters.
Yes, we integrate high-performance OEM-approved acrylic foam tapes (such as 3M 4229P, 3M EX4008, and Tesa tape solutions) via inline heat-assisted taping processes. These adhesive systems are specially formulated for permanent paint-metal bonding, withstanding temperature cycling, high moisture, and dynamic shear strain.
To prevent profile deformation or permanent compression coil-set during transit, profiles can be supplied cut-to-length in protective rigid cartons or coiled onto heavy-duty wooden/plastic reels wrapped in moisture-barrier anti-UV foil bags, fully palletized according to ISPM 15 heat-treatment standards.
Browse additional custom engineered sealing profiles for window glass channels, heavy-duty machinery, architectural curtain walls, and door frame enclosures.
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