Custom EPDM Products
Ethylene Propylene Diene Monomer (EPDM) is a saturated, non-polar synthetic elastomer derived from ethylene, propylene, and a small amount of diene (commonly ENB or DCPD) that provides crosslinking sites during vulcanization. EPDM is best known for its exceptional resistance to heat, ozone, steam, weathering, and polar fluids, making it one of the most stable and long-lasting elastomers available for outdoor and high-temperature environments.
At Eutsler Technical Products, our EPDM compounds are formulated for long-term sealing performance in applications where water, steam, glycol, or weather exposure would degrade most hydrocarbon rubbers. EPDM elastomers combine excellent aging stability, low compression set, and outstanding flexibility across a wide temperature range, providing durable sealing and vibration isolation in harsh outdoor or high-moisture environments.
Performance Advantages
- Excellent resistance to heat, ozone, and weathering ideal for outdoor and high-temperature exposure; maintains elasticity over time.
- Outstanding resistance to water, steam, and polar fluids performs reliably in hot-water and glycol systems.
- Wide service temperature range remains flexible down to –65 °F and stable up to 300 °F.
- Low compression set and long-term resilience maintains sealing pressure and elasticity under continuous load.
- Good electrical insulation properties high dielectric strength and resistance to tracking and corona discharge.
- Excellent compatibility with brake fluids, ketones, and phosphate esters ideal for chemical-processing and braking systems.
- Non-staining, low-permeability polymer ensures stable dimensional control and consistent sealing behavior.
Applications
Eutsler’s custom EPDM compounds are used extensively in environments where heat, water, and outdoor exposure are dominant.
Typical applications include:
- HVAC and steam service gaskets and seals
- Brake system and coolant hoses
- Outdoor enclosures and electrical insulation
- Weatherstripping and roofing membranes
- Vibration isolators and expansion joints
- Diaphragms and O-rings exposed to water, glycol, or steam
- Food- and potable-water service components (FDA or NSF grades available)
EPDM is widely used in industrial, automotive, aerospace, and power-generation systems, particularly where resistance to aging, moisture, and polar fluids is essential.
Superior Material Performance
Eutsler’s EPDM compounds provide:
- High elongation and tensile strength (up to 2,500 psi)
- Excellent resistance to ozone cracking, aging, and UV degradation
- Stable compression-set performance even under elevated temperature and moisture exposure
- Good dielectric properties and surface resistivity for electrical applications
- Flexibility in compounding — available as peroxide-cured or sulfur-cured systems for targeted mechanical or thermal properties
Note: EPDM has poor resistance to petroleum-based oils, fuels, and non-polar solvents. For oil-resistant environments, NBR, HNBR, or FKM are preferred.
General Characteristics of EPDM Elastomers
| Property | Typical Range / Rating | Comments |
|---|---|---|
| Durometer Range (Shore A) | 40 – 90 | Custom hardness available for dynamic or static seals |
| Tensile Strength (psi) | 1,000 – 2,500 | Excellent for weather- and heat-resistant rubber |
| Elongation at Break (%) | 200 – 600 | High flexibility and recovery |
| Compression Set | Excellent | Retains sealing force at high temperature |
| Resilience / Rebound | Good | Balanced elasticity; moderate damping |
| Abrasion Resistance | Fair – Good | Suitable for static and low-wear applications |
| Tear Resistance | Good | Stable under flex and pressure cycling |
| Oil Resistance | Poor | Not suitable for petroleum-based fluids |
| Solvent Resistance | Good (polar solvents) | Excellent for water, ketones, alcohols, glycols |
| Water / Steam Resistance | Excellent | Ideal for wet, hot service |
| Low-Temperature Usage | –65 °F (–55 °C) | Retains flexibility in cold environments |
| High-Temperature Usage | +300 °F (150 °C) | Continuous service; up to 350 °F intermittent |
| Weather / Ozone / Sunlight Resistance | Outstanding | Excellent long-term aging and UV stability |
| Electrical Properties | Excellent | High dielectric strength; good insulator |
| Adhesion to Metals | Fair – Good | Can be enhanced with bonding agents |
Get in Touch with Our Experts Today!
Work with Eutsler for Precision-Molded EPDM Components
With over 60 years of elastomer expertise, Eutsler Technical Products designs and manufactures custom EPDM components optimized for long service life in outdoor, fluid, and thermal applications.
Our engineering team collaborates with clients to define hardness, cure system, and filler selection for precise balance between flexibility, sealing strength, and heat resistance.
As an ISO 9001:2015-certified company, Eutsler ensures tight quality control and consistency from formulation through production.
Request a quote today for EPDM components engineered to meet your performance specifications.
Summary
EPDM is the elastomer of choice for outdoor, high-temperature, and moisture-rich environments, combining long-term aging stability, sealing performance, and flexibility across an exceptionally wide service range.
- Chemical Family: Ethylene-Propylene-Diene Terpolymer (EPDM)
- Service Temperature Range: –65 °F to +300 °F (–55 °C to +150 °C)
- Distinguishing Features: Superior resistance to heat, ozone, water, and steam
- Key Advantages:
- Excellent outdoor and weather resistance
- Long-term stability in polar and aqueous environments
- Low compression set and high elasticity
- Electrical insulation capability
- Limitations:
- Not resistant to petroleum oils or hydrocarbon solvents
- Moderate mechanical and tear strength compared to NR or HNBR
Why Choose Eutsler Technical Products?
R&D
Experienced staff develop high performance and long life parts
Material Selection
Over 300 compounds or custom elastomeric compounds available
Mold Design
Custom molds are designed ensuring tolerances are met
Manufacturing
Molding, extrusion and die cutting services to build your part
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