Gaskets · Made to order
Rocker-Cover, Sump & Intake-Manifold Gaskets — AEM, FKM or Silicone
Press-in-place and flat moulded gaskets for rocker covers, sumps, timing covers, gearbox pans and differentials, and for intake manifolds, water pumps, thermostats and oil-filter housings. Moulded in AEM, FKM or silicone (VMQ) to your drawing. Exhaust-manifold gaskets are MLS steel, not rubber, so we don’t make them. Made at our plant in Vilholi, Nashik.
- SEND
- Cover or housing drawing, groove section, fluid
- MATERIAL
- AEM · FKM · silicone (VMQ); EPDM for coolant-side joints
- TEMPERATURE
- AEM to +160 °C; EPDM to +140 °C; silicone to +200 °C; FKM to +250 °C
- FORM
- Press-in-place or flat moulded
- MADE TO ORDER
- ISO 9001:2015
- 09111526A
Key facts
Rocker-cover and sump gaskets are press-in-place or flat moulded rubber seals between an engine cover and its housing that hold back hot oil and blow-by. Margo Rubber moulds rocker-cover, sump and intake-manifold gaskets in AEM, FKM or silicone (VMQ) to the cover drawing in Vilholi, Nashik.
Margo Rubber specifies AEM for rocker covers and sumps to +160 °C continuous, silicone (VMQ) to +200 °C and FKM to +250 °C. Exhaust-manifold gaskets are multi-layer steel (MLS), not rubber, so Margo does not make them.
Product gallery
Visual Reference
What we need from your drawing
- Outline
- To your cover or housing drawing
- Section
- To the groove, for press-in-place
- Bolt holes
- To your drawing, for flat gaskets
- Compression limiters
- Where the drawing calls for them
For a press-in-place gasket, send the groove section. The gasket is sized to fill it, not to the cover outline alone.
Technical specifications
Engineering Data
- Product family
- Gaskets
- Material
- AEM, FKM, silicone (VMQ); EPDM for coolant-side joints
- Hardness (Shore A)
- To your drawing
- Tensile strength / elongation
- Per compound datasheet, tested to ASTM D412
- Compression set
- Tested to ASTM D395 Method B
- Operating temperature
- By compound; see the table below
- Colour
- Black standard; other colours on request
- Lead time
- Confirmed with the quotation, from approved drawing and approved sample.
- Certifications
- ISO 9001:2015, certificate 09111526A, Integral Certification Ltd.
- Minimum order
- Set by part size and tooling, quoted with the part. Prototype and first-article lots sit outside it.
Dimensional reference
- Outline
- To your cover or housing drawing
- Section
- To the groove, for press-in-place
- Bolt holes
- To your drawing, for flat gaskets
- Compression limiters
- Where the drawing calls for them
Available materials
Rubber Compound Options
Select the compound best suited to your operating environment and application requirements.
| Rank | Compound | Temperature | Choose it when |
|---|---|---|---|
| Default | AEM | −40 to +160 °C | Hot engine oil and blow-by on rocker covers and sumps, to +160 °C continuous. |
| Leave AEM if… | the joint sees fuel or runs hotter | — | Specify FKM (−20/+250 °C). |
| Leave AEM if… | the joint is coolant-side | — | Specify EPDM (−40/+140 °C). |
| Leave AEM if… | the joint sees dry heat, not oil | — | Specify silicone (−60/+200 °C), which does not suit hot oil over long service. |
| Leave AEM if… | it is an exhaust-manifold joint | — | That is an MLS steel gasket, not rubber. We don’t make it. |
| Also available | NBR (−30 to +120 °C) · Neoprene (CR) (−40 to +120 °C) · SBR (−30 to +100 °C) · Natural rubber (−20 to +90 °C) | See each compound | The rows above are about which one your part needs. |
Not sure? Send the medium, temperature and load
SERVICE RANGE
−40 to +160 °C
AEM
Key advantages
Why Specifiers Choose Margo
Compound by fluid
Oil side gets AEM or FKM; coolant side takes EPDM. The fluid decides, not the part name.
Sized to the groove
Press-in-place gaskets are moulded to fill your groove section, so they stay put when the cover goes on.
We say what we don’t make
Exhaust-manifold gaskets are MLS steel. Buying them from a rubber maker is a mistake we won’t sell you.
Tested in-house
Compression set, heat ageing and fluid swell in our own lab, with the report in every shipment.
Industries served
Global Applications
Automotive
Engines, gearboxes and axles on cars, commercial vehicles and tractors
Manufacturing process
From Compound to Certification
Material compounding
Polymer, fillers and cure system mixed in-house for the medium and temperature on your drawing. Cure is checked on our ODR rheometer.
Tool design
Moulds designed and made for your part and held as a controlled record. When a mould already exists, first samples take 48–72 hours.
Moulding
Compression moulded, with the cavity count set by your volume.
Trimming
Flash trimmed to the edge condition on the drawing.
Inspection
Dimensions against the drawing, hardness and batch sampling. Results go into the shipment documents.
Export packing
Packed by part number with labels that match the inspection sheet. ISPM-15 treated pallets where timber is used.
Quality assurance
Tested in Our Own Lab, Documented in Every Shipment
Every consignment ships with a material test report, a dimensional inspection sheet and a certificate of conformance. Hardness, tensile and elongation (ASTM D412), density, compression set (ASTM D395 Method B), heat ageing, ozone resistance, fluid swell and low-temperature tests run in our own lab, and cure curves run on our own ODR rheometer. PPAP is available on request. RoHS declarations are issued for all compounds.
ISO 9001:2015 · Certificate 09111526A
Integral Certification Ltd
Scope: rubber moulded components — quality management, not a product approval
ISO 9001:2015, certificate 09111526A, Integral Certification Ltd. Scope: rubber moulded components. It certifies the quality management system, not a product approval.
Certification detailProduction metrics
- 60+
- Active clients
- 48–72 hours
- First samples when the mould exists
- 48 hours
- Quotation from receipt of drawing
Downloads
Technical Documentation
Compound datasheets and part drawings are issued on request, under NDA where required.
Request the datasheetFAQ
Technical & Commercial Questions
Answers to the most common questions from engineering teams and procurement managers worldwide.
What is the minimum order for cover and sump gaskets?
There is no fixed number. The minimum is set by part size and tooling, and we quote it with the part. Send the drawing and your annual volume and you get both figures in one reply. Prototype and first-article lots sit outside the minimum.
Do you make exhaust-manifold gaskets?
No. They are multi-layer steel (MLS), not rubber.
Can you copy a gasket from a used one?
Yes, with the cover or its drawing. A used gasket has taken a set, so we size from the groove, not the squashed part.
Do you send test reports with each shipment?
Yes, with every consignment: material test report, dimensional inspection sheet and certificate of conformance. 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 export orders?
TT and LC, agreed per order. Ex-works Nashik or FOB Nhava Sheva. The commercial invoice, packing list and certificate of origin (Nashik Chamber of Commerce) travel with every consignment.
Same compound
Other parts we mould in the same compounds
- Oil Filler Cap O-Rings — Moulded to ISO 3601 Sizes · AEM
- AEM Insulation Bush — High-Temperature · AEM
- Plunger Seals & Plunger Cups — Moulded for the Fluid You Pump · AEM
- Compression Pump Inlays — Moulded Elastomer Inserts · AEM
- Rubber Oil Filler Cap — Push-In, Sealed or Vented · AEM
- Cylinder Head Cover Insulator — Engine Noise Damping · AEM
Need this part quoted?
Send the cover or housing drawing, the groove section, the fluid and your annual quantity. We respond within 48 hours.