Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of extruded rubber seal in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made extruded rubber seal from our factory.
Material Properties
Resistant to extreme temperatures and weathering
Extruded rubber seals are made of EPDM (ethylene propylene diene monomer) or silicone rubber (VMQ) materials, can withstand temperatures ranging from -60°C to +250°C, are resistant to UV rays, ozone, and humid environments, and have an outdoor service life of more than 15 years.
Chemical resistance and environmental adaptability
• Dense molecular structure;
• Excellent barrier properties to acids, alkalis, oils, solvents and oxidizing media;
• EPDM material is more suitable for water vapor environments, while silicone rubber is compatible with food and medical grade scenarios.
High rebound and anti-compression deformation
The dynamic compression deformation rate is less than 15%, and the elastic modulus is scientifically optimized to ensure rapid rebound after long-term pressure, and no gap remains on the sealing interface.
Wear and fatigue resistance properties
• PTFE coating or self-lubricating modified layer is added to the surface of the extruded rubber seal, reducing the friction coefficient by 40%;
• After 500,000 cycles of compression testing, the sealing performance decay is ≤5%.
Lightweight and structural compatibility
• The density is only 1/4 of that of metal seals;
• Supports customization of special-shaped sections;
• Can integrate hollow cavities, magnetic inserts or conductive fibers to meet multifunctional composite needs.
Technical Parameters
|
Hardness (Shore A) |
Tensile Strength |
Elongation at Break |
Compression Set |
Color |
Cross-Section Type |
Common Materials |
Operating Temperature |
Environmental Resistance |
Applications |
|
50–70 |
≥5 MPa |
≥300% |
≤30% (70°C × 22h) |
Customizable |
Solid Foamed Solid + Foamed Composite With Steel Core / Metal Reinforced |
Ethylene Propylene Diene Monomer (EPDM) |
-50° to 150°C |
Water resistant, steam resistant, aging resistant |
Building doors and windows, curtain wall seals; automotive door frames, sunroofs, trunks; outdoor cabinets, distribution boxes, equipment enclosures; ships, containers, outdoor machinery |
|
Nitrile Rubber (NBR) |
-40° to 120°C |
Oil resistant, wear resistant |
Engine surroundings, near oil lines; oil pumps, oil tanks, construction machinery; equipment seals in oily environments |
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|
Chloroprene Rubber (CR) |
-40° to 120°C |
Weather resistant, aging resistant, flame retardant |
Electrical cabinets, distribution panels; ventilation ducts, HVAC equipment; flame-retardant required areas |
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|
Silicone Rubber (VQM) |
-70° to 220°C |
Extreme temperature resistant, biocompatible |
Ovens, steamers, high-temperature equipment; food machinery, medical devices; extreme temperature sealing |
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|
Natural Rubber (NR) |
-60° to 90°C |
Elastic, wear resistant, tear resistant |
Cushioning, anti-collision strips; light machinery; door/ window impact protection |
Application Scenario
Building doors, windows and curtain walls
The multi-cavity structure of extruded rubber seal blocks rain, noise and air infiltration, saving energy and reducing noise by more than 30%.
01
Automobile manufacturing
Oil-resistant and heat-resistant materials are suitable for door sealing, engine compartment insulation and waterproof and dustproof of new energy battery boxes.
02
Electronic equipment
Conductive/insulating composite sealing strips simultaneously solve EMI shielding and IP67 protection requirements.
03
Household appliances
Food-grade silicone seals are used in humid and high-temperature environments such as refrigerators and dishwashers, which are safe and pollution-free.
04
Aerospace
Fluororubber (FKM) seals can withstand extreme working conditions such as fuel, hydraulic oil and ultra-low temperature.
05
Customized Services
Material selection
NBR (nitrile rubber): cost-effective oil-resistant solution, suitable for mechanical seals and fuel systems.
CR (chloroprene rubber): flame retardant and ozone resistant, suitable for outdoor power equipment and rail transportation.
FKM (fluororubber): extremely chemical resistant, used for aerospace and chemical reactor seals.
TPE/TPV: recyclable and environmentally friendly materials that meet EU REACH and RoHS directives
Technology and structure customization
Section design: Provide 20+ section libraries such as single lip, double lip, mushroom head, maze, etc., support 3D drawing customization.
Dimension accuracy: Tolerance control ±0.1mm, adapted to the sealing requirements of micron-level precision equipment.
Composite technology: Can be embedded in metal skeleton, nylon cloth reinforcement layer or foam sponge composite to improve pressure bearing and cushioning performance.
Value-added services
Color and logo: Provide RAL color card color selection, support laser marking or fluorescent bar tracking.
Quick proofing: Complete mold development and small batch trial production within 7 days, shortening the project cycle.
Certification support: Pass ISO 9001, IATF 16949 and UL certification, and comply with international standard tests such as ASTM and DIN.
FAQ
Q: Do you have the test and audit service?
A: Yes, we can assist to get the designated test report for product and the designated factory audit report.
Q: May I have new sample made with my design for confirmation?
A: Yes. Sample charge means set up charge for production line, little quantity we suggest that straight for production. Large quantity we suggest that sample first, and sample fee can be refund after it arrives a certain amount.
Q: How can I place an order?
A: You can contact us our sales person for an order. Please provide the details of your requirements as clear as possible. So we can send you the offer at the first time.
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