EPDM (Ethylene Propylene Diene Rubber) vs PTFE (Teflon): 0% composition overlap. Significantly different materials serving different application areas.
EPDM (Ethylene Propylene Diene Rubber) vs PTFE (Teflon)
Side-by-side chemical composition and mechanical property comparison.
Overview
EPDM (Ethylene Propylene Diene Rubber)
Ethylene propylene diene monomer rubber — THE outdoor/weather elastomer. Saturated backbone gives outstanding ozone, UV, and weathering resistance. Excellent resistance to steam, hot water, and polar solvents. NOT resistant to oils/fuels (opposite of NBR). Good electrical insulation. ρ 0.85-1.3 (lightest common rubber). Used for automotive door/window seals, roofing membranes, radiator hoses, HVAC gaskets, and pond liners.
PTFE (Teflon)
Polytetrafluoroethylene — the most chemically resistant polymer. Lowest friction coefficient of any solid material (~0.05-0.10). Service range -240°C to +260°C continuous. Cannot be melt-processed — must be sintered from powder (like ceramics). Very low mechanical strength. Trade name Teflon (Chemours/DuPont). Used for seals, gaskets, bearings, non-stick coatings, chemical reactor linings, electrical insulation, and lab equipment.
| EPDM (Ethylene Propylene Diene Rubber) | PTFE (Teflon) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 37 | ISO 12086 |
Chemical composition (wt%) — Pro
| Element | EPDM (Ethylene Propylene Diene Rubber) | PTFE (Teflon) | Overlap |
|---|---|---|---|
| Ethylene | 45–75% | — | — |
| Propylene | 25–55% | — | — |
| Diene (ENB/DCPD) | 2–10% | — | — |
| Base Polymer (Polytetrafluoroethylene) | — | 99.5–99.9% | — |
Mechanical properties — Pro
| Property | EPDM (Ethylene Propylene Diene Rubber) | PTFE (Teflon) | Unit |
|---|---|---|---|
| Tensile Strength | 7–21 | 20–35 | MPa |
| Elongation | 100–700 | 200–400 | % |
| hardness_shore_a | 30–90 | — | Shore A |
| Density | |||
| continuous_service_temp | |||
| Elastic Modulus | |||
| Melting Point | |||
| Continuous Use Temp | |||
| friction_coefficient | |||
| Water Absorption (24h) | |||
| Tensile Strength | |||
| Tensile Modulus | |||
| Elongation at Break | |||
| Density | |||
| Melting Point | |||
| Continuous Use Temp | |||
| Coefficient of Friction | |||
| Dielectric Constant (1MHz) | |||
| Water Absorption (24h) |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
EPDM (Ethylene Propylene Diene Rubber) and PTFE (Teflon) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is EPDM (Ethylene Propylene Diene Rubber) the same as PTFE (Teflon)?
EPDM (Ethylene Propylene Diene Rubber) and PTFE (Teflon) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace EPDM (Ethylene Propylene Diene Rubber) with PTFE (Teflon)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between EPDM (Ethylene Propylene Diene Rubber) and PTFE (Teflon)?
The main differences are in the following elements: overall alloying content. EPDM (Ethylene Propylene Diene Rubber) is a Polymers grade, while PTFE (Teflon) is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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