576 NSF Certified EPDM
576 NSF Certified EPDM is a 75 Shore A solid EPDM elastomer certified by NSF International to NSF/ANSI/CAN 61 and meeting the NSF 372 lead content rule, specifically designed for potable water and wastewater applications. It delivers a minimum tensile strength of 1,500 psi, minimum ultimate elongation of 250%, and a compression set of 20% maximum after 22 hours at 158°F, with a service temperature range of -40°F to 275°F. Certification was obtained through extensive product testing and requires multiple audits by NSF International at the manufacturing facility.
Key Properties
- Hardness (Shore A): 75 ±5 (ASTM D2240)
- Tensile Strength: 1,500 psi min. (ASTM D412)
- Ultimate Elongation: 250% min. (ASTM D412)
- Compression Set, 22 hrs @ 158°F: 20% max (ASTM D395B)
- Specific Gravity: 1.17 gr/cc
Temperature Range: -40°F to 275°F
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Thickness | 1/16″, 1/8″, 3/16″, 1/4″ | — |
| Color | Black | — |
| Finish | Smooth | — |
| Polymer | Ethylene Propylene (EPDM) | — |
| Specific Gravity | 1.17 gr/cc | — |
Mechanical Properties
| Property | Value | Test Method |
| Hardness (Shore A) | 75 ±5 | ASTM D2240 |
| Tensile Strength | 1,500 psi min. | ASTM D412 |
| Ultimate Elongation | 250% min. | ASTM D412 |
| Compression Set, 22 hrs @ 158°F | 20% max | ASTM D395B |
| Ozone Resistance @ 72 hrs @ 100 pphm @ 104°F | No Cracking | ASTM D1149 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Range | -40°F to 275°F | — |
| Cold Temperature | -40°C/°F min. | ASTM D2137 |
Electrical Properties
| Property | Value | Test Method |
| Dielectric Properties, range, volts/mil — Sample conditioning: None | <2 (1/8″) | ASTM D149 |
Aging Performance — Heat Aging (70 Hours @ 212°F)
| Property | Value | Test Method |
| Hardness Change | +/- 15 points max | ASTM D573 |
| Tensile Change | +/- 30% max. | ASTM D573 |
| Elongation Change | -50% max. | ASTM D573 |
Regulatory / Compliance Data
| Property | Value | Test Method |
| American Water Works Association Standard | Pass | C111/A21.11 |
| FDA 21 CFR 177.2600 | Pass | — |
| NSF/ANSI/CAN 61 Certified + meets NSF 372 Lead Content Rule & American Water Works Association standard C111/A21.11 | Certified | — |
Compliance
- NSF/ANSI/CAN 61 — Compliant (Certified by NSF International)
- NSF 372 Lead Content Rule — Compliant
- American Water Works Association Standard C111/A21.11 — Compliant (Pass)
- FDA 21 CFR 177.2600 — Compliant (Pass)
- ASTM D2000: 1BA715Z1 — Compliant (Rated)
- Gaskets and seals for potable water distribution systems, pipe joints, and fittings requiring NSF/ANSI/CAN 61 and AWWA C111/A21.11 compliance
- Sealing components for drinking water treatment and distribution infrastructure where NSF 372 lead content compliance is mandatory
- Wastewater system gaskets and seals requiring chemically inert, weather- and ozone-resistant EPDM at service temperatures up to 275°F
- Water meter, valve, and pump sealing applications requiring low compression set and long-term dimensional stability under sustained compressive load
- Outdoor and UV-exposed water system gaskets requiring excellent resistance to heat, ozone, and sunlight
Common industries: Municipal water utilities, water treatment, plumbing and piping systems, wastewater management, industrial water systems.
576 NSF Certified EPDM is a 75 durometer solid EPDM elastomer engineered for drinking water and wastewater service, where regulatory compliance and long-term chemical safety are essential requirements.
The material is NSF/ANSI/CAN 61 certified by NSF International — a certification obtained through extensive product testing and maintained through multiple facility audits — and meets the NSF 372 lead content rule, ensuring the cleanest and safest option for potable water contact. It also meets American Water Works Association Standard C111/A21.11 and the requirements of FDA 21 CFR 177.2600, and is rated to ASTM D2000: 1BA715Z1.
The material provides excellent resistance to heat, ozone, and sunlight, as well as superior resistance to cold and hot water. Ozone resistance is confirmed at 72 hours at 100 pphm and 104°F with no cracking per ASTM D1149. Compression set performance is 20% maximum after 22 hours at 158°F — a notably tight limit that supports long-term sealing performance in water system applications.
Heat aging performance per ASTM D573 (70 hours @ 212°F) shows maximum hardness change of ±15 points, maximum tensile change of ±30%, and maximum elongation change of -50%. Dielectric properties at 1/8″ thickness are rated at less than 2 volts/mil with no sample conditioning per ASTM D149.
Compliant with NSF/ANSI/CAN 61, NSF 372 Lead Content Rule, American Water Works Association Standard C111/A21.11, and FDA 21 CFR 177.2600. Rated to ASTM D2000: 1BA715Z1.
What differentiates 576 NSF Certified EPDM from standard or FDA-grade EPDM compounds?
576 NSF Certified EPDM is specifically certified to NSF/ANSI/CAN 61 and NSF 372 by NSF International through extensive product testing and ongoing facility audits — a higher regulatory bar than FDA 21 CFR 177.2600 food-contact compliance alone. It is harder (75 Shore A vs. 60 Shore A for the FDA-grade compound), delivers higher tensile strength (1,500 psi min. vs. 1,000 psi min.), and achieves a tighter compression set limit (20% max vs. 50% max), supporting more demanding long-term sealing performance in pressurized water systems. It also carries AWWA C111/A21.11 compliance, which is specific to potable water infrastructure.
Why is compression set critical for EPDM used in water system gaskets and seals?
Compression set determines how well a gasket material recovers after sustained compressive loading — which in water systems means how well the gasket maintains sealing force against pipe flanges, valve faces, and fitting joints over years of service. A high compression set allows the gasket to permanently deform under the bolt load, reducing contact stress and eventually allowing leaks to develop. 576 NSF Certified EPDM achieves a maximum compression set of 20% after 22 hours at 158°F (ASTM D395B) — a tight limit that supports reliable, long-term sealing integrity in potable water and wastewater applications.
What is the service temperature range for 576 NSF Certified EPDM?
576 NSF Certified EPDM is rated for service from -40°F to 275°F, as listed on the TDS. Cold temperature performance is confirmed to -40°C/°F minimum per ASTM D2137.
Is 576 NSF Certified EPDM suitable for potable water and regulated water infrastructure applications?
Yes. 576 NSF Certified EPDM is NSF/ANSI/CAN 61 certified by NSF International and meets the NSF 372 lead content rule, qualifying it for potable water contact applications. It also meets American Water Works Association Standard C111/A21.11 and FDA 21 CFR 177.2600, and is rated to ASTM D2000: 1BA715Z1.
How should 576 NSF Certified EPDM be specified?
Specify grade (576 NSF Certified EPDM), thickness (1/16", 1/8", 3/16", or 1/4"), color (black), compliance requirements (NSF/ANSI/CAN 61, NSF 372, AWWA C111/A21.11, FDA 21 CFR 177.2600, ASTM D2000: 1BA715Z1), dimensional tolerances, and finished format.
