Editorial Technical Reference

Automotive Weatherstrip

This page explains how Automotive Weatherstrip is classified within Rubber and Plastic Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

An extruded rubber or thermoplastic elastomer profile designed to create a watertight, airtight, and dustproof seal between moving and fixed parts of an automobile.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Automotive Weatherstrip

Definition
An extruded rubber or thermoplastic elastomer profile designed to create a watertight, airtight, and dustproof seal between moving and fixed parts of an automobile. It is a critical component for vehicle NVH (Noise, Vibration, and Harshness) performance, weather protection, and structural integrity. Manufactured through continuous extrusion processes, it often incorporates metal or plastic reinforcement cores for shape retention and mounting clips for assembly. It is a high-volume consumable part in the automotive aftermarket.

Typical materials include EPDM rubber, thermoplastic elastomer (TPV), steel wire reinforcement, and polypropylene clips. The profile is supplied in rolls with a standard length of 1000–6000 meters per roll. The cross-section profile, defined by a 2D drawing reference for the extrusion die, ranges from 10 to 50 units (dimensionless). Standard color is RAL 9005 (black). Reinforcement type may be steel insert or none. Mounting clips are spaced at 150–300 mm intervals.

Key physical and mechanical parameters include: hardness of 60±5 Shore A (per ISO 7619-1), tensile strength of at least 8 MPa (per ISO 37), elongation at break of at least 300% (per ISO 37), compression set of at most 30% after 22 hours at 70°C (per ISO 815), operating temperature range of -40 to 85°C, density of 1.15–1.25 g/cm³ (per ISO 1183), and weight of 0.5–2.0 kg/m depending on profile size. The material is specified as EPDM with excellent weather resistance, referenced to ASTM D2000.

These values are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The product is a component, not a finished assembly, and its performance depends on proper installation and mating surface conditions.
Working Principle
The flexible elastomer body compresses against mating surfaces to form a continuous barrier, preventing the ingress of water, air, dust, and noise while allowing for the movement of doors and windows. The compression set and hardness determine the long-term sealing force. The profile's cross-section and reinforcement core maintain shape under repeated compression and temperature cycling. Mounting clips secure the weatherstrip to the vehicle body, ensuring correct positioning and consistent sealing pressure.
Common Materials
EPDM rubber, Thermoplastic Elastomer (TPV), Steel wire reinforcement, Polypropylene clips
Technical Parameters
ParameterTypical rangeNotes & selection driver
Profile LengthRequired1000–6000 m/rollStandard supplied length per roll
Cross-Section ProfileRequired10–50 n/a2D drawing reference for extrusion die
ColorRAL 9005 n/aStandard color (e.g., black)
Reinforcement TypeRequiredSteel insert n/aCore material (e.g., steel, none)
Clip Spacing150–300 mmDistance between mounting clips
MaterialEPDMExcellent weather resistanceASTM D2000
Hardness60±5 Shore ABalance of flexibility and sealingISO 7619-1
Tensile Strength≥8 MPaMinimum for durabilityISO 37
Elongation at Break≥300 %Ensures flexibilityISO 37
Compression Set≤30 %At 70°C for 22hISO 815
Operating Temperature-40–85 °CContinuous service range
Density1.15–1.25 g/cm³Typical for EPDMISO 1183
Weight0.5–2.0 kg/mDepends on profile size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Automotive Weatherstrip.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 0.5 bar sealing pressure, 0 to 2 bar water/air pressure resistance
other spec: UV resistance: 1000+ hours, Compression set: ≤25% after 22h at 70°C
temperature: -40°C to +85°C continuous, -50°C to +120°C intermittent
Media Compatibility
✓ Automotive paint surfaces ✓ Glass surfaces ✓ Galvanized steel
Unsuitable: Continuous exposure to petroleum-based solvents or hydraulic fluids
Sizing Data Required
  • Door/window/trunk gap dimensions (width and height)
  • Required compression force (N/mm)
  • Vehicle body material and surface finish

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Compression set
Cause: Permanent deformation due to prolonged compression, thermal aging, or material degradation from UV exposure and ozone attack, leading to loss of sealing force and water/air leaks.
Adhesive failure or detachment
Cause: Loss of bond between weatherstrip and vehicle body due to improper surface preparation, contamination, adhesive degradation from temperature cycling or moisture ingress, or mechanical stress from door/panel movement.
Maintenance Indicators
  • Visible gaps, tears, or hardening/cracking of the rubber seal, especially at corners or high-stress areas.
  • Audible wind noise or whistling at highway speeds, or water ingress during rain/washing indicating compromised sealing.
Engineering Tips
  • Apply a silicone-based lubricant or protectant specifically designed for automotive rubber seals every 6-12 months to prevent drying, cracking, and maintain flexibility without degrading the material.
  • Ensure proper alignment and adjustment of doors, windows, and panels during installation or maintenance to avoid excessive compression or shear forces on the weatherstrip, and clean bonding surfaces thoroughly with recommended solvents before adhesive application.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASTM D2000 — Standard Classification System for Rubber Products in Automotive Applications DIN 7716 — Rubber products: requirements for storage, cleaning and maintenance

Quoted from the published standard.

Manufacturing Precision
  • Hardness: 60 +/-5 Shore A
  • Compression Set: <= 30%
Quality Inspection
  • Compression Set Test (ASTM D395)
  • Weathering Resistance Test

Manufacturers of Automotive Weatherstrip

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Guangdong Zhongxiang New Materials Co., Ltd. (ZYX Rubber)
Guangzhou, Guangdong, CN
ISO 9001:2015 IATF 16949
Listed on the company's own website · profile compiled by CNFX from public sources
Nangong Letu Automotive Components Co., Ltd.
Nangong, Hebei, CN
IATF 16949:2016
Listed on the company's own website · profile compiled by CNFX from public sources
Hebei Shida Seal Group Co., Ltd.
Hebei, CN
Founded 1983
IATF 16949:2016
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
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Frequently Asked Questions

What materials are used for automotive weatherstrips?

Common materials include EPDM rubber, thermoplastic elastomer (TPV), steel wire reinforcement, and polypropylene clips. The specific material grade should be confirmed with the supplier.

What are the typical dimensions and tolerances?

Profiles are supplied in rolls of 1000–6000 meters. Cross-section dimensions are defined by a 2D drawing reference, with a range of 10–50 units. Clip spacing is 150–300 mm. These are reference ranges; exact values depend on the vehicle model.

How does the weatherstrip contribute to vehicle NVH?

By forming a continuous seal, it reduces noise, vibration, and harshness from wind, water, and road. The elastomer's compression set and hardness affect long-term sealing performance.

What standards apply to automotive weatherstrip materials?

Material properties are referenced to standards such as ASTM D2000 for EPDM, ISO 7619-1 for hardness, ISO 37 for tensile and elongation, ISO 815 for compression set, and ISO 1183 for density. These are verification references, not proof of certification.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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