Explore our top-tier precision-molded and extruded sealing systems designed to withstand extreme environments.
In the modern automotive industry, glass sealing strips have evolved from basic dynamic barriers into highly integrated sub-systems. With the exponential rise of Electric Vehicles (EVs) and smart cabins, the demands on NVH (Noise, Vibration, and Harshness) attenuation, weight reduction, and aerodynamic optimization have never been higher.
Modern vehicle cabins require superior acoustic isolation from wind noise, especially at highway speeds where engine noise is absent in EVs. High-performance EPDM (Ethylene Propylene Diene Monomer) and silicone rubber formulations provide the foundational elasticity, long-term compression set resistance, and environmental durability necessary to meet IATF 16949 standards.
Comparative physical properties of modern automotive glass sealing compounds.
| Material Formulation | Hardness (Durometer Shore A) | Tensile Strength (MPa) | Compression Set (22h @ 70°C) | UV & Ozone Resistance | Primary Target Application |
|---|---|---|---|---|---|
| Dense EPDM (Sulfur/Peroxide Cured) | 60 - 80 | ≥ 10.5 | ≤ 25% | Excellent | Windshield surrounds, primary door seals, outer glass run channels |
| EPDM Sponge (Sponge Rubber) | 15 - 35 (Asker C) | ≥ 2.5 | ≤ 30% | Excellent | Inner dynamic dust barriers, trunk lid frame seals, RV double-door systems |
| Thermoplastic Vulcanizate (TPV) | 55 - 75 | ≥ 8.0 | ≤ 35% | Very Good | Recyclable trim seals, multi-durometer co-extrusions, corner moldings |
| Silicone Rubber (VMQ) | 50 - 70 | ≥ 7.0 | ≤ 20% | Outstanding | Extreme temperature profiles, customized specialty gaskets, EV battery packs |
Zhejiang Haala Automotive Parts Co., Ltd. is a medium-sized private enterprise mainly engaged in the production of various types of vehicle sealing strips, integrating scientific research, development, production, and sales. With strong technical strength and management experience, we have established advanced production equipment such as dedicated EPDM production lines, rubber molding production lines, flat vulcanization machines, and precision extruders.
Our production workflow is optimized for a one-stop production model spanning raw material preparation, custom tooling/mold development, and high-volume product molding. This allows us to guarantee consistent tolerances and competitive lead times.
Our extensive manufacturing footprint covers: various automotive sealing strips, door and window sealing strips, air conditioning sealing strips, furniture sealing strips, electrical sealing strips, foam sealing strips, mechanical sealing strips, automotive windshield sealing strips, decorative strips, skeleton strips, extruded sealing strips, E-type, P-type, D-type sealing strips, EPDM sponge (foam) sealing strips, three-composite sealing strips, dense sponge steel core three-composite sealing strips, four-composite sealing strips, soft-hard composite sealing strips, and custom rubber molded parts.
We deliver unparalleled engineering value, reliable quality assurance, and a highly responsive global supply chain.
Professional production of various automotive sealing strips, door and window sealing strips, air conditioning sealing strips, furniture sealing strips, electrical sealing strips, and foam sealing strips. We possess the scale and capacity to service massive high-volume OEM contracts seamlessly.
The company has strong technical strength and management experience. The testing methods are complete, forming a one-stop production mode of raw material preparation, mold development, and product molding. We guarantee that every custom batch matches exact architectural and mechanical prints.
Our products are sold to Japan, Germany, the United States, France, Iran, Australia, Türkiye, India, Nigeria, Brazil, Russia, and other countries, and have received high praise from customers. Our global presence ensures localized logistical support and seamless customs compliance.
Zhejiang Haala Automotive Parts Co., Ltd. leverages China’s highly integrated chemical supply chains to source ultra-pure rubber polymers. Being based in the famous industrial zones of Qinghe County, we benefit from raw material accessibility and a dense hub of engineering expertise.
Through our automated continuous microwave vulcanization lines, we significantly reduce energy consumption per metric ton of rubber. This efficiency allows us to provide massive cost advantages to overseas buyers without compromising dimensional tolerances.
Additionally, our in-house tooling shop can develop custom extrusion dies within 7 to 10 working days, a fraction of the time required by traditional Western toolmakers. This flexibility accelerates the client's prototyping and PPAP (Production Part Approval Process) milestones.
We monitor cross-linking density throughout the profile to ensure consistent elastic recovery.
Sealing profiles undergo cyclic testing under extreme ultraviolet radiation, humidity, and salt fog.
Continuous optical measuring checks dynamic run channels to adhere strictly to ISO 3302-1 Class E1 specifications.
From arctic sub-zero climates to extreme desert heat, our custom sealing strips are tailored for regional demands.
Seals exposed to climates like Northern Europe and Canada are prone to freeze-binding and embrittlement, which causes micro-cracking and subsequent water leaks.
Our Solution: Peroxide-cured EPDM with customized plasticizers that retain a low glass-transition temperature down to -50°C, paired with anti-freeze slip-coatings.
High ultraviolet exposure and fine airborne dust particles cause rapid elastomer degradation, surface tackiness, and elevated cabin wind noise.
Our Solution: Advanced silicone composite extrusions and UV-stabilized EPDM profiles treated with low-friction polymer coatings to repel fine sand particles and resist ozone cracks.
Constant humidity, chemical exposure (acid rain), and micro-biological colonization attack rubber compounds, leading to mold growth and surface pitting.
Our Solution: Biocide-infused compounds coupled with dual-lip hydrophobic geometries that channel heavy rainfall away from the vehicle structural chassis.
For Tier-1 automotive parts procurers and aftermarket distributors, sourcing rubber seals requires balancing mechanical capabilities with commercial efficiency. We structure our dynamic client partnerships to minimize supply-chain risk through the following strategic steps:
Our engineering department matches your CAD blueprints against target physical properties (tensile strength, elongation at break, and hardness).
Using electric discharge machining (EDM) and high-speed CNC milling, we manufacture precision extrusion dies to produce clean, high-accuracy profiles.
We supply detailed inspection reports, chemical material datasheets, and physical samples for laboratory validation prior to mass-production release.
Continuous microwave vulcanization extrusions are automatically cut to length, edge-trimmed, flocked, packaged in custom reels or pallets, and dispatched via sea freight.
Expert answers regarding materials chemistry, manufacturing tolerance limits, and OEM purchasing processes.
Reliable dynamic seals, trunk profiles, and adhesive weatherstrips built for long-term service.
Haala Parts