High-performance EPDM, Silicone, and Composite Extrusions Engineered for OEM Noise, Vibration & Harshness (NVH) Reduction.
In modern vehicle design, commercial building architecture, and high-precision industrial machinery, acoustic attenuation is no longer a luxury—it is a critical parameter of operational quality, user experience, and structural compliance. Sound-absorbing sealing solutions sit at the intersection of material chemistry, fluid dynamics, and mechanical engineering. As a premier global OEM/ODM Sound-Absorbing Sealing Solutions Manufacturer, Zhejiang Haala Automotive Parts Co., Ltd. (operating in alignment with advanced research facilities including Hebei Ruiyuan Automotive Parts Co., Ltd.) delivers custom engineered sealing systems that dramatically reduce acoustic transmittance, structural vibration, fluid ingress, and thermal exchange.
The global industrial seal market is experiencing a profound paradigm shift driven by technological evolution across three major sectors:
Electric Vehicles (EVs) remove internal combustion engine (ICE) masking noise, making wind, road, and HVAC noise significantly more noticeable. Tier-1 automotive OEMs require dual-density and triple-composite EPDM seals with custom bulb geometries to achieve superior high-frequency cabin isolation.
Modern curtain wall systems, passive houses, and urban commercial complexes enforce rigid acoustic ratings (STC 45+). Weatherstrips must maintain long-term elasticity under extreme UV, ozone, and temperature swings without compression set failure.
Industrial machinery enclosures, server cabinets, medical refrigeration, and HVAC units demand fire-retardant (UL94-V0), anti-vibration, and dustproof sponge rubber seals to shield sensitive electronics and control workplace acoustic exposure.
Zhejiang Haala Automotive Parts Co., Ltd. (operating alongside Hebei Ruiyuan Automotive Parts Co., Ltd.) is a medium-sized private enterprise dedicated to scientific research, product design, compound formulation, tooling development, extrusion, molding, and global supply of comprehensive vehicle and industrial sealing systems. Situated in the Matun Industrial Zone of Qinghe County—China's recognized center for elastomer extrusion excellence—the company brings nearly a decade of specialized expertise to international B2B clients.
Our vertically integrated, single-site production campus spans raw material blending, CAD/CAM die design, continuous microwave vulcanization lines, flat vulcanization presses, angle molding, and automated quality verification. Operating under the guiding principles of "People-oriented, Technology-driven, Quality-first, and Reputation-first", Haala delivers unmatched consistency, short lead times, and rigorous precision.
Equipped with continuous EPDM extrusion vulcanization lines, silicone extruders, rubber molding production lines, and flat vulcanization machinery. Specializing in automotive door seals, window weatherstripping, air conditioning seals, electrical cabinet gaskets, and dense-sponge composite structures.
Strong technical management and complete testing infrastructure forming an efficient one-stop manufacturing ecosystem: from compound mixing and die tooling development to final extrusion, corner splicing, flocking coating, and dynamic fatigue testing.
Our engineered soundproofing products are trusted across major global markets including Japan, Germany, the United States, France, Iran, Australia, Türkiye, India, Nigeria, Brazil, Russia, and beyond, earning widespread international acclaim.
Over 100+ Custom Extrusion Profiles and Formulations Tailored to Exact Technical Standards.
Dense EPDM + Sponge EPDM + Steel Core / Wire Carrier. Three-composite and four-composite profiles providing structural grip and soft acoustic sealing for automotive body frames and heavy machinery enclosures.
Self-adhesive sponge rubber profiles in D-shape, P-shape, E-shape, and custom hollow-chamber bulbs designed to optimize acoustic energy loss and airflow deflection across dynamic gaps.
Food-grade and flame-retardant silicone pipes, transparent strips, and heat-resistant cabinet door gaskets operating seamlessly across -60°C to +250°C environments.
Door glass sliding groove strips, water-blocking glass strips, glass pressure moldings, and electrostatic flock-coated profiles for smooth glass movement and friction-free noise isolation.
Modified PVC, TPE, and EPDM building rubber strips for aluminum alloy doors, plastic-steel windows, structural curtain walls, and fireproof expanding door seals.
Reinforced rubber hoses, wrapped oil pipes, flame-retardant air lines, water delivery hoses, and high-pressure flex lines manufactured under strict ISO quality controls.
Heavy-duty refrigerated truck door gaskets, shipping container frame seals, and commercial fridge magnetic/sponge gaskets engineered to prevent thermal leak and moisture ingress.
Precision molded EPDM/NBR/Silicone rubber pads, anti-vibration dampers, mechanical grommets, custom seals, and specialized shock-absorbing mounts engineered to customer CAD drawings.
Objective physical performance criteria backing our acoustic sealing technologies.
| Material / Profile Class | Hardness Range (Shore A) | Working Temperature | Acoustic Reduction Index (dB) | Primary Industrial Applications |
|---|---|---|---|---|
| Dense EPDM Steel Composite | 65 - 85 Shore A | -40°C to +120°C | 32 - 42 dB | Automotive Primary Body Doors, Heavy Machinery Cabins |
| Micro-Cellular EPDM Sponge | 15 - 35 Shore A | -40°C to +120°C | 28 - 38 dB | Secondary Automotive Seals, Windshield Trim, Hood Seals |
| High-Purity Silicone Sponge | 10 - 40 Shore A | -60°C to +250°C | 30 - 40 dB | Medical Refrigeration, Electric Vehicle Battery Packs, HVAC |
| Modified Thermoplastic PVC/TPE | 55 - 90 Shore A | -25°C to +70°C | 25 - 35 dB | Architectural Aluminum Windows, Cabinet Enclosures, Furniture |
| Nitril Rubber (NBR) Sponge | 20 - 45 Shore A | -30°C to +100°C | 27 - 36 dB | Oil-Resistant Machinery Gaskets, Marine Engine Compartments |
Expert answers to common engineering, customization, and global procurement queries.
EPDM (Ethylene Propylene Diene Monomer) sponge rubber features a micro-cellular structure with closed and semi-open cells that absorb medium-to-high frequency airborne sound waves while dissipating mechanical vibration. Unlike standard PVC, EPDM retains exceptional elasticity, UV resistance, and compression set resistance across extreme temperature ranges (-40°C to +120°C), making it the superior material for automotive NVH reduction and long-term exterior architectural seals.
Yes. We provide complete OEM/ODM end-to-end customization. Our in-house toolmaking facility can develop precise extrusion dies, co-extrusion cross-sections, and vulcanization tooling directly from 2D/3D CAD drawings (STEP, DWG, IGES) or physical samples within 7-14 business days, complete with rapid prototyping and sample validation.
Our products strictly conform to international industrial and automotive benchmarks including IATF 16949 quality standards, REACH, RoHS, UL94-V0 fire retardancy (for specialized silicone/EPDM lines), and ISO 9001:2015 management protocols. Material test certificates (MTC) and third-party laboratory reports are supplied with production orders.
Multi-composite seals solve three problems simultaneously: the rigid embedded steel/wire core grips the sheet metal frame securely without adhesive; the dense EPDM body provides structural integrity; and the soft sponge EPDM bulb compresses softly against the matching surface to create an airtight, watertight, sound-isolating acoustic barrier.
For standard stocked profiles, MOQs start as low as 500 meters. Custom extruded profiles typically carry an MOQ of 1,000 to 3,000 meters depending on compound complexity. Production lead time averages 15 to 25 days following sample confirmation, with shipping capabilities to ports worldwide across Europe, North America, Asia-Pacific, and South America.
Explore Our Full Range of OEM/ODM Weatherstrips, Gaskets, and Soundproof Strips.
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