EPDM extrusion rubber strips are precision-engineered sealing components manufactured through continuous extrusion of Ethylene Propylene Diene Monomer (EPDM) compound. These profiles are widely deployed in construction glazing systems, automotive door and window seals, HVAC equipment gasketing, electrical enclosure protection, and industrial machinery vibration control. They deliver consistent cross-sectional geometry, stable physical properties, and long-term environmental resistance.
At Jinjiang Yunli Technology Co., Ltd. (flexmer.com), we manufacture custom EPDM extrusion rubber strips with over 23 years of rubber formulation and precision manufacturing expertise. Our custom manufacturing capabilities include compound recipe tailoring for specific hardness, color, and environmental performance requirements; rapid tooling development with typical sample lead times of 7-15 days; extrusion, co-extrusion, and molding processes for complex multi-lip and hollow profiles; and dimensional tolerance control meeting ISO 3302-1 standards for Class 1 precision profiles. Whether you require flat solid strips, sponge rubber strips, hollow profiles, multi-lip sealing systems, U-shaped channels, T-shaped profiles, D-shaped bumpers, or edge protection strips, our engineering team provides complete OEM/ODM support from design optimization through mass production.
Core Product Features
Custom EPDM extrusion profiles – OEM/ODM supported
Shore A 50-80 hardness, customizable to spec
-40°C to +120°C continuous operating range
UV and ozone resistant – no cracking, no hardening
Low compression set – long-term sealing reliability
ISO 9001:2015 certified manufacturing facility
Extrusion, co-extrusion, and molding capabilities
Low MOQ wholesale – prototype to mass production
Material and Technical Specifications
The following technical parameters represent standard EPDM extrusion rubber strip specifications. All values are adjustable based on customer compound requirements and application conditions.
Material: EPDM (Ethylene Propylene Diene Monomer)
Manufacturing Process: Extrusion / Co-extrusion / Molding
Hardness: 50–80 Shore A (customizable 30–90 Shore A) – ASTM D2240
Tensile Strength: ≥7.0 MPa – ASTM D412
Elongation at Break: ≥300% – ASTM D412
Compression Set: ≤30% (22h @ 70°C) – ISO 815-1
Temperature Range: -40°C to +120°C (standard); special formulations available
Density (Solid): 1.10–1.35 g/cm³ – ASTM D792
Density (Sponge): 0.60–0.75 g/cm³ (varies by grade) – ASTM D792
Color: Black (standard); custom colors available
UV Resistance: Excellent – no cracking, minimal fading – ASTM G154
Ozone Resistance: No cracking (200 pphm @ 40°C, 72h) – ASTM D1149
Water Resistance: Excellent – impermeable to moisture
Certifications: ISO 9001:2015, RoHS compliant
Material callout per ASTM D2000 M2BA710, A14, B13, C12, F17, P2 is available upon request.
Quality Control and Testing Standards
FLEXMER maintains a comprehensive quality management system aligned with ISO 9001:2015 requirements. Every batch of EPDM extrusion rubber strip undergoes rigorous in-process and final inspection protocols.
Raw Material Incoming Inspection: Each EPDM compound shipment is tested for Mooney viscosity, cure characteristics, and specific gravity before production release. Compound traceability is maintained from raw material to finished product.
In-Process Dimensional Control: Continuous monitoring of extrusion profile dimensions using laser micrometers and optical measurement systems ensures compliance with customer-specified tolerances. Typical tolerance: ±0.10mm for critical dimensions per ISO 3302-1 Class 1.
Physical Property Testing: Finished strips are sampled and tested for tensile strength (ASTM D412), elongation at break, Shore A hardness (ASTM D2240), and compression set (ISO 815-1).
Environmental Aging Tests: Ozone resistance testing at 200 pphm concentration, 40°C for 72 hours with no cracking observed. UV weathering per ASTM G154. Low-temperature brittleness tested at -40°C per ASTM D2137.
Dimensional and Visual Inspection: 100% visual inspection for surface defects, followed by statistical sampling for dimensional verification. All products are inspected for consistent cross-section, smooth surface finish, and absence of voids or contamination.
Packaging and Traceability: Each roll or cut length is labeled with batch number, material code, dimensions, and date of manufacture, ensuring full traceability throughout the supply chain.
Typical Application Scenarios
EPDM extrusion rubber strips serve critical sealing, insulation, and protection functions across diverse industrial and commercial sectors.
Automotive and Transportation: Door weatherseals, trunk lid seals, window glazing channels, hood seals, bus and railway vehicle compartment gaskets, and EV battery pack enclosure seals. EPDM's resistance to automotive fluids, temperature cycling, and UV exposure ensures service life exceeding 10 years in exterior applications.
Building and Construction: Commercial window and door glazing seals, curtain wall gasketing, storefront framing weatherstripping, roof membrane flashings, and expansion joint seals. EPDM's ozone and UV resistance prevents hardening and cracking in high-exposure facade applications.
HVAC and Electrical Equipment: Air handling unit gaskets, duct sealing strips, electrical enclosure door seals, control cabinet weatherproofing, and solar panel mounting system gaskets. The material's dielectric properties and temperature stability make it suitable for both indoor and outdoor electrical applications.
Industrial Machinery and Marine: Machine enclosure sealing, vibration dampening mounts, conveyor system edge seals, marine hatch gaskets, and pump housing seals. EPDM's resistance to water, steam, and mild chemicals supports reliable operation in harsh industrial environments.
Renewable Energy: Solar panel frame seals, wind turbine tower access hatch gaskets, and renewable energy equipment enclosure weatherstripping. Long-term outdoor exposure capability without significant property degradation is critical for these applications.
Frequently Asked Questions
Q: What is the typical tooling cost and lead time for a custom EPDM extrusion profile?
A: Tooling cost for a standard extrusion die ranges from $500 to $2,500 depending on profile complexity and cross-section size. Prototype samples are typically available within 7-15 business days from die completion, with mass production lead times of 2-4 weeks for initial orders.
Q: What dimensional tolerances can FLEXMER achieve for custom EPDM extrusion strips?
A: We maintain dimensional tolerances per ISO 3302-1 Class 1 for extrusion profiles, typically ±0.10mm for critical dimensions up to 10mm and proportional tolerances for larger sections. Tighter tolerances are available upon request for precision applications.
Q: How does EPDM perform in continuous high-temperature or extreme cold environments?
A: Standard EPDM compounds maintain functional performance from -40°C to +120°C. For sustained high-temperature service above 120°C, we offer specialty EPDM formulations with enhanced thermal stability. Low-temperature flexibility is retained down to -50°C with specially formulated compounds.
Get Your Custom EPDM Sealing Solution Today
Submit your CAD drawings, 3D models, or custom profile specifications to receive a complimentary material recommendation, precise tooling quotation, and free factory samples shipped within 48 hours. Our engineering team is ready to develop your custom EPDM extrusion rubber strip solution from prototype to full-scale production.
Contact FLEXMER now – Email: sales@flexmer.com | WhatsApp: +86-15959599282
Jinjiang Yunli Technology Co., Ltd. – ISO 9001:2015 Certified EPDM Rubber Extrusion Manufacturer Since 2002
