- SHORE A
- ±5 pts against the specified hardness
- TENSILE
- Per compound datasheet, tested to ASTM D412
Gaskets · Made to order
EPDM Gaskets — Weather, Steam and Water Service
EPDM gaskets for weather, steam and water service — −40 to +140 °C, with the ozone and UV resistance general-purpose rubber does not have. Moulded or die-cut to your drawing, or to ASME B16.21, AWWA C111 and EN 681-1 dimensions, at our plant in Nashik.
- HARDNESS
- 40–90 Shore A, to your drawing
- TEMPERATURE
- −40 to +140 °C
- THICKNESS
- Sheet thickness for die-cut gaskets
- WIDTH
- Maximum blank size
- STANDARDS
- ASME B16.21 · AWWA C111/A21.11 · EN 681-1
- MADE TO ORDER
- ISO 9001:2015
- 09111526A
Product gallery
Visual Reference
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Cross section viewGasket profile on request under NDA
- Max width
- Maximum blank size — to your drawing
- Thickness
- Sheet thickness — to your drawing
- Flange standard
- ASME B16.21, AWWA C111/A21.11, EN 681-1, or to your drawing
- Bolt-hole pattern
- To the flange standard or your drawing
- Form
- Moulded or die-cut
Gasket profile available on request. Send the flange standard and size, or a sample gasket, and we will return a dimensioned drawing for approval.
Technical specifications
Engineering Data
- Product Family
- Gaskets
- Material
- EPDM
- Hardness (Shore A)
- 40–90 Shore A; 60–70 typical for flange gaskets
- Tensile Strength
- Per compound datasheet, tested to ASTM D412
- Elongation at Break
- Per compound datasheet, tested to ASTM D412
- Operating Temperature
- −40 to +140 °C
- Compression Set
- Tested to ASTM D395 Method B
- Density
- Per compound datasheet
- Colour Options
- Black standard, custom RAL on request
- Lead Time
- Confirmed with the quotation, from approved drawing and approved sample
- Media compatibility
- Water, steam, glycol, brake fluid, dilute acids and alkalis. Not mineral oil
- Dimensional standards
- ASME B16.21, AWWA C111/A21.11, EN 681-1
- Certifications
- ISO 9001:2015 — certificate 09111526A, valid to 21 February 2027
- Minimum Order
- 10,000 pieces per part number, per compound, or quoted against the part where geometry or tooling makes that unrealistic. Prototype and first-article lots sit outside the minimum.
Dimensional reference
- Max width
- Maximum blank size — to your drawing
- Thickness
- Sheet thickness — to your drawing
- Flange standard
- ASME B16.21, AWWA C111/A21.11, EN 681-1, or to your drawing
- Bolt-hole pattern
- To the flange standard or your drawing
- Form
- Moulded or die-cut
Available materials
Rubber Compound Options
Select the compound best suited to your operating environment and application requirements.
| Rank | Compound | Temperature | Choose it when |
|---|---|---|---|
| THIS PAGE | EPDM | −40 to +140 °C | Water, steam, glycol, brake fluid, weather and ozone exposure. The default for anything wet or outdoors |
| Leave EPDM if… | the medium is mineral oil or fuel | — | EPDM swells badly in mineral oil. Specify NBR (−30/+120 °C) or, above its range, FKM (−20/+250 °C) |
| Leave EPDM if… | sustained temperature exceeds +140 °C | — | Specify AEM (−40/+160 °C continuous), silicone (−60/+220 °C, dry service) or FKM |
| Leave EPDM if… | the joint is heavily abraded | — | Specify natural rubber (−20/+90 °C), which has the best abrasion resistance of the eight |
| Also available | Neoprene · SBR · silicone · NBR · FKM · AEM · natural rubber | See the compound table | Every gasket we make is available in all eight compounds — the rows above are about which one your joint needs |
Not sure? Send the medium, temperature and load
SERVICE RANGE
−40 to +140°C
EPDM
Key advantages
Why Specifiers Choose Margo
Water, steam and weather
EPDM is the compound for anything wet or outdoors — hot water, steam, glycol, brake fluid, and years of UV and ozone without perishing.
Not for mineral oil
EPDM swells badly in oil. If the joint sees oil or fuel, specify NBR; above +120 °C, FKM. Saying so is cheaper than a failed joint.
To the flange standard you specify
ASME B16.21 for nonmetallic flat gaskets, AWWA C111/A21.11 for ductile-iron pipe joints, EN 681-1 for water and drainage seals — or to your own drawing.
Potable water needs a named approval
Approval is granted to a specific compound formulation, not to “EPDM”. Tell us which scheme your market requires — WRAS, NSF/ANSI 61, AS/NZS 4020 — and we will confirm what we can supply against it.
Industries served
Global Applications
Water & Fluid Management
Pipe joints, valve and pump housings, treatment skids, tanks
Automotive
Cooling and brake systems, body sealing and trim
Heavy Industry
Enclosure, cover and access-panel sealing on plant
Infrastructure
Pipework, window and access-cover sealing
Manufacturing process
From Compound to Certification
Material compounding
Polymer blending, additive integration and batch QC in our in-house lab. The cure system is set here — peroxide-cured EPDM where the joint sees steam or hot water, sulphur-cured where it does not.
Tool or die design
Moulds for shaped gaskets, cutting dies for flat ones, made in-house and held as a controlled record.
Moulding or sheet calendering
Shaped gaskets compression moulded; flat gaskets cured as sheet to the specified thickness.
Die-cutting or trimming
Flat gaskets cut to the flange profile and bolt pattern; moulded gaskets flash-trimmed.
Quality inspection
Dimensional check against the flange standard, hardness testing and batch sampling. Bolt-hole pitch is what is checked.
Export packaging
Industrial packing with documentation. ISPM-15 treated pallets where timber packaging is used. Flat gaskets are packed flat and interleaved, never stacked under load.
Quality assurance
Certified to International Standards
Every product leaves our facility with a documentation package — material test reports, dimensional inspection sheets and a certificate of conformance — giving traceability from raw material to finished part.
ISO 9001:2015 · Certificate 09111526A
Integral Certification Ltd · Valid to 21 February 2027
Scope: rubber moulded components — quality management, not a product approval
Production metrics
- Since 2005
- In operation
- 60+
- Active clients
- 3–4 weeks from approved sample
- Avg. lead time
Downloads
Technical Documentation
EPDM compound datasheets and gasket profiles are issued on request, under NDA where required. Tell us the flange standard and the medium — DXF or PDF for the profile — and we will send what we hold.
Request the EPDM datasheetFAQ
Technical & Commercial Questions
Answers to the most common questions from engineering teams and procurement managers worldwide.
What is the minimum order quantity for this part?
We supply in bulk. The minimum run is 10,000 pieces per part number, per compound, or quoted against the part where geometry or tooling makes that unrealistic. Prototype and first-article lots sit outside the minimum.
Can you match a competitor specification or reverse-engineer an existing part?
Yes. Send the sample gasket or the flange standard and nominal bore. An in-service gasket has taken a compression set and measures thinner than it was cut — we specify to the original thickness, not to the compressed sample.
What file formats do you accept for drawings?
PDF, DWG and DXF. For a flange gasket the standard and the nominal bore are often enough — ASME B16.21, AWWA C111 or EN 681-1 — and we will cut to the dimensional tables. A 3D model is not required.
Do you provide material test reports with each shipment?
Yes. Material test reports, dimensional inspection sheets and a certificate of conformance ship with every consignment. Hardness, tensile to ASTM D412 and compression set to ASTM D395 Method B are tested in-house.
What are your payment and delivery terms for international orders?
TT and LC accepted, discussed per order. Ex-works Nashik or FOB Nhava Sheva. Commercial invoice, packing list and certificate of origin are issued with every consignment.
Same compound
Other parts we mould in the same compounds
Need this part quoted?
Send your drawing, a sample gasket, or just the flange standard and bore. We confirm compound, hardness and profile, then quote against your annual quantity. We respond within 48 hours.