Markez Z1 FFKM O-Ring: Compound, Equivalents, UK Suppliers
Verified by Rachel Mayfield, Supply Chain Analyst - April 2026
Markez Z1 is a 75 Shore A perfluoroelastomer (FFKM) manufactured by Marco Rubber. It seals continuously to 327°C and is specified for chemical process and similar service. General-purpose FFKM.
Specifications
| Property | Value |
|---|---|
| Compound | Z1 |
| Manufacturer | Marco Rubber |
| Maximum continuous temperature | 327°C |
| Minimum temperature | -25°C |
| Hardness | 75 Shore A |
| Colour | Black |
| Material family | General-purpose FFKM |
Where Markez Z1 is used
Markez Z1 is specified for: Chemical process, refinery.
Markez Z1 equivalents from other FFKM manufacturers
If Markez Z1 isn't available, these compounds from competing manufacturers have similar chemistry and operating windows. Always verify against your actual fluid and temperature before substitution.
| Equivalent compound | Manufacturer | Max temp | Hardness | Direct match |
|---|---|---|---|---|
| Kalrez 4079 | DuPont (Chemours) | 316°C | 75 Shore A | ✓ |
| Chemraz 615 | Greene Tweed | 324°C | 75 Shore A | ✓ |
| Perlast G75B | Precision Polymer Engineering | 327°C | 75 Shore A | ✓ |
Available O-ring sizes
Markez Z1 is supplied in:
- BS 1806 sizes: BS001 to BS932 (UK / EU standard, imperial-origin metric)
- AS568 sizes: -001 to -932 (US standard, dimensionally identical to BS 1806)
- ISO 3601 sizes: metric IDs from 2 mm to 670 mm with cross-sections 1.0 mm to 7.0 mm
- JIS B 2401: P, G, S series (Japanese OEM equipment)
- Custom / non-standard: built-to-print for OEM applications
For a list of sizes commonly stocked in the UK, see the BS 1806 size chart, ISO 3601 metric chart, or contact a UK seal specialist below.
UK availability
Markez Z1 is supplied in the UK by FFKM specialists carrying multiple manufacturer lines. Lead time is typically 2-5 working days for stock sizes, 4-8 weeks for custom-moulded sizes. Use the form below to get a quote from a UK FFKM specialist.
References
- Marco Rubber — Manufacturer
- ISO 3601 O-ring sizes
- BS 1806
Frequently Asked Questions
What is Markez Z1 used for?
Markez Z1 is a 75 Shore A FFKM (perfluoroelastomer) compound from Marco Rubber. It is used in Chemical process, refinery. Continuous service temperature: -25°C to 327°C.
What is the temperature rating of Markez Z1?
Markez Z1 has a continuous service temperature range of -25°C to 327°C. Short-term excursions above the maximum are possible but degrade service life.
What is the equivalent of Markez Z1?
Direct equivalents to Markez Z1 include: Kalrez 4079, Chemraz 615, Perlast G75B. Always confirm chemical compatibility against your specific fluid before substitution.
How much does Markez Z1 cost?
FFKM O-rings such as Markez Z1 are typically £30 to £500 per piece depending on size, with custom or large-bore parts at the upper end. Get a current quote via the form on this page.
Where can I buy Markez Z1 in the UK?
Markez Z1 is supplied in the UK by independent FFKM seal specialists with multi-brand inventory. Lead time is 2-5 working days for stock BS/AS568 sizes, 4-8 weeks for custom-moulded sizes.
References
- Marco Rubber — Manufacturer
- ISO 3601 O-ring sizes
- BS 1806