We evaluated 52 EPDM gasket manufacturers across the United States and narrowed the list to eight top-performing suppliers using our proprietary ranking algorithm. Each company was assessed on five factors that directly affect OEM sourcing decisions: precision and tolerance capability, industry experience and quality record, EPDM material expertise and certifications, lead time and on-time delivery, and technical access for engineering and procurement teams.
Ranking Algorithm
- Precision & Tolerance Capability (25%): Achievable tolerances across production runs, die-cutting method, and in-process quality controls.
- Industry Experience & Quality Track Record (25%): Years in continuous operation, documented defect history, and long-term OEM relationships.
- EPDM Material Expertise & Certifications (20%): Depth of EPDM compound knowledge and compliance credentials (NSF-61, FDA, ISO).
- Lead Time & On-Time Delivery (15%): Standard turnaround from U.S.-based facilities and documented on-time delivery performance.
- Technical Access & Engineering Support (15%): Direct access to engineers or executives for design support and fast problem resolution.
Best EPDM Gasket Manufacturers of 2026
| Rank | Company | Established | Location | Tolerance | Certifications | EPDM Specialty | Standard Lead Time |
|---|---|---|---|---|---|---|---|
| 1 | Colvin Friedman | 1949 | Petaluma, CA | ±0.005″ | NSF-61, FDA | Custom OEM; HVAC, water treatment, automotive | 3 weeks |
| 2 | Stockwell Elastomerics | 1919 | Philadelphia, PA | Tight; waterjet & knife | AS9100D, ISO 9001 | Silicone-primary; EPDM multi-compound | Quick-turn available |
| 3 | Hennig Gasket & Seals | 1920 | Chicago, IL | Custom cut | 100+ years in operation | Non-metallic; broad EPDM range | Prototype to production |
| 4 | Sur-Seal | 1965 | Cincinnati, OH | CNC & waterjet | ISO 9001; 3M Preferred | Multi-material; EPDM to composites | Regional distribution |
| 5 | Spec Rubber | 1968 | Alabaster, AL | High-volume press | NSF-61, UL, AWWA | Waterworks & pipeline EPDM | Volume production |
| 6 | Denver Rubber Company | 1972 | Denver, CO | Custom die cut | ISO 9001 | Multi-material OEM gaskets | OEM-tailored |
| 7 | Allstate Gasket | 1989 | Deer Park, NY | Die & kiss cut | ISO 9001:2015 | Broad EPDM; JIT programs | JIT / EDI |
| 8 | Elastostar Rubber | — | Plain City, OH | Extruded profiles | U.S. manufacturer | EPDM & silicone extrusion | Standard |
Best EPDM Gasket Manufacturers of 2026: Descriptions & Reviews
1. Colvin Friedman
Colvin Friedman has delivered precision die-cut EPDM gaskets to OEMs for over 75 years without a single recorded quality rejection. Based in Petaluma, California, since 1949, the company serves HVAC, water treatment, automotive, and industrial enclosure applications, achieving ±0.005-inch tolerances with direct access to VP Josh Rodman for design review and same-day quotes.
- Precision & Tolerance: ±0.005-inch tolerances across full production runs — the tightest standard in the industry for die-cut EPDM.
- Experience & Track Record: Zero recorded quality rejections maintained across 75+ years of continuous manufacturing since 1949.
- EPDM Expertise & Certifications: NSF/ANSI 61 certification for potable water, FDA-compliant formulations, and expert guidance on compound selection.
- Lead Time & Delivery: Three-week standard lead time with a 99.99% on-time delivery rate and zero reported stock-outs.
- Technical Access: Direct line to VP Josh Rodman for material consultation and 24-hour quote response.
2. Stockwell Elastomerics
Founded in Philadelphia in 1919, Stockwell Elastomerics is an employee-owned gasket manufacturer holding AS9100D and ISO 9001 certifications, known for strong elastomer inventory, rapid prototyping, and engineering support across aerospace, electronics, and medical device sectors.
- Precision & Tolerance: Waterjet, digital knife cutting, and die cutting deliver consistent edge quality across complex geometries.
- Experience & Track Record: 100+ years of operation with AS9100D aerospace-grade certification and four generations of leadership.
- EPDM Expertise & Certifications: Silicone-primary, but supports EPDM and multi-compound requirements with in-house material testing.
- Lead Time & Delivery: Quick-turn prototyping and standard production supported by comprehensive in-house inventory.
- Technical Access: ESOP-owned team where every employee is personally invested in customer outcomes.
3. Hennig Gasket & Seals
Founded in 1920 by Otto Hennig, Hennig Gasket & Seals is one of the longest-operating gasket fabricators in the country, still family-owned, producing virtually any non-metallic shape or configuration from a single Chicago facility.
- Precision & Tolerance: State-of-the-art cutting equipment produces consistent custom shapes in prototype and production quantities.
- Experience & Track Record: 100+ years of continuous family ownership and non-metallic gasket production.
- EPDM Expertise & Certifications: Extensive EPDM and non-metallic sealing material range for diverse industrial applications.
- Lead Time & Delivery: In-house operations support flexible turnaround for both prototype and full production runs.
- Technical Access: Direct, family-owned team with deep institutional fabrication knowledge available for consultation.
4. Sur-Seal
Founded in Cincinnati in 1965, Sur-Seal is an ISO 9001-certified, 3M Preferred Converter with 235+ employees serving OEMs including Boeing, Honeywell, Caterpillar, and Emerson across aerospace, automotive, HVAC, and industrial sectors.
- Precision & Tolerance: CNC knife cutting, die cutting, and waterjet deliver dimensional accuracy across multi-material assemblies.
- Experience & Track Record: 60+ years in operation with ISO 9001 and 3M Preferred Converter status.
- EPDM Expertise & Certifications: Converts EPDM alongside premium materials from Rogers, Trelleborg, and Saint-Gobain.
- Lead Time & Delivery: Regional distribution and flexible delivery options for domestic OEM supply chains.
- Technical Access: Multinational OEM program experience across a large, specialized engineering team.
5. Spec Rubber
Based in Alabaster, Alabama, since 1968, Spec Rubber is one of the nation’s largest domestic industrial rubber gasket manufacturers, holding NSF-61, UL, AWWA, and Bureau Veritas certifications and named Alabama’s Small Manufacturer of the Year.
- Precision & Tolerance: High-volume press production engineered for consistent output in waterworks and pipeline programs.
- Experience & Track Record: 55+ years in operation; NSF, UL, AWWA, and Bureau Veritas certified; Alabama Manufacturer of the Year.
- EPDM Expertise & Certifications: NSF-61 certified specialist with proprietary Toruseal® and Barracuda® EPDM gasket lines.
- Lead Time & Delivery: High-volume production suited to large infrastructure procurement cycles.
- Technical Access: Dedicated sales representatives for contractor and OEM project support.
6. Denver Rubber Company
Denver Rubber Company has served industrial OEMs since 1972, evolving from a hose manufacturer into a custom gasket specialist, now in its third generation of family ownership, known for high-quality output and a genuine focus on OEM relationships.
- Precision & Tolerance: Custom die cutting to OEM specifications with consistent output across repeat programs.
- Experience & Track Record: Third-generation family business with 50+ years of integrity and quality craftsmanship.
- EPDM Expertise & Certifications: Multi-material EPDM inventory with design collaboration for new application programs.
- Lead Time & Delivery: OEM-tailored turnaround with emphasis on fast response and supply chain reliability.
- Technical Access: Family-owned structure ensures direct communication with experienced team members.
7. Allstate Gasket
Founded in 1989 in Deer Park, New York, Allstate Gasket is an ISO 9001:2015-certified manufacturer and distributor offering die cutting, kiss cutting, vulcanization, and JIT delivery for OEM and industrial accounts.
- Precision & Tolerance: Die cutting, kiss cutting, and vulcanization for a broad range of sealing applications.
- Experience & Track Record: 36+ years in operation; ISO 9001:2015 certified; worldwide OEM distribution.
- EPDM Expertise & Certifications: Broad EPDM and rubber sealing materials under ISO 9001:2015 quality standards.
- Lead Time & Delivery: JIT, EDI, and flexible packaging aligned with manufacturing supply chain needs.
- Technical Access: Phone and email support, with a commitment to prompt responses to all inquiries.
8. Elastostar Rubber Corporation
Elastostar Rubber of Plain City, Ohio, manufactures custom extruded rubber profiles and die-cut gaskets in EPDM, silicone, and specialty elastomers for automotive, industrial, and equipment applications.
- Precision & Tolerance: Custom die-cut and extruded profiles with extrusion-based shape accuracy for profile-specific sealing.
- Experience & Track Record: Ohio-based domestic manufacturer with a growing portfolio of custom rubber and EPDM products.
- EPDM Expertise & Certifications: EPDM and silicone compounds for diverse sealing and weather-resistance applications.
- Lead Time & Delivery: Standard timelines with online quote submission for fast order entry.
- Technical Access: Online quote platform and technical team available for material and application inquiries.
Best EPDM Gasket Manufacturers for High-Precision OEM Production
Best EPDM Gasket Manufacturers for Rapid Prototyping & Custom Development
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