Markez Z1 vs Perlast G75B: FFKM Compound Comparison

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Reviewed by MLC Editorial Team | 7 June 2026

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Markez Z1 and Perlast G75B are both perfluoroelastomer (FFKM) compounds used in chemical, refinery, and process applications. Markez Z1 vs Perlast G75B They share similar chemistry but differ on temperature ceiling, hardness, and intended service. This page compares the two side-by-side and explains when to specify each.

Side-by-side comparison

Property	Markez Z1	Perlast G75B
Manufacturer	Marco Rubber	Precision Polymer Engineering
Compound	Z1	G75B
Maximum continuous temp	327°C	327°C
Minimum temp	-25°C	0°C
Hardness	75 Shore A	75 Shore A
Colour	Black	Black
Typical applications	Chemical process, refinery	Chemical process, pharma, refinery, food (G75H FDA variant)

When to specify Markez Z1

Markez Z1 suits chemical process and similar service. Continuous temperature window is -25°C to 327°C, hardness 75 Shore A. Manufactured by Marco Rubber.

When to specify Perlast G75B

Perlast G75B suits chemical process and similar service. Continuous temperature window is 0°C to 327°C, hardness 75 Shore A. Manufactured by Precision Polymer Engineering.

Key differences

Temperature ceiling: Perlast G75B runs 0°C hotter (327°C vs 327°C). Specify the higher-rated compound when continuous service is above 327°C.
Hardness: Both are 75 Shore A, so groove design and squeeze percentage are interchangeable.
Manufacturer: Markez Z1 is from Marco Rubber; Perlast G75B is from Precision Polymer Engineering. Lead time and UK availability vary by brand.
Cost: FFKM pricing varies by manufacturer, batch size, and stock position. Both compounds are at the premium end of elastomer pricing (£30 to £500+ per O-ring depending on size).

Get a UK quote on either compound

Get a quote for Markez Z1 vs Perlast G75B: FFKM Compound Comparison

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Related pages

References

Marco Rubber - Markez Z1
Precision Polymer Engineering - Perlast G75B
BS 1806
ISO 3601

Frequently Asked Questions

Can I substitute Markez Z1 for Perlast G75B?

Yes, Markez Z1 and Perlast G75B are both FFKM compounds with overlapping chemical compatibility. Verify your specific fluid against both manufacturers' compatibility tables before substitution. Temperature window, hardness, and certifications may differ.

Which is hotter: Markez Z1 or Perlast G75B?

Perlast G75B has a higher continuous temperature ceiling (327°C vs 327°C, a 0°C difference).

Which costs less: Markez Z1 or Perlast G75B?

FFKM compound pricing depends on manufacturer, batch size, certifications, and current stock position rather than headline brand. Both compounds are at the premium end of elastomer pricing. Get current UK quotes on both before specifying.

Where can I buy Markez Z1 or Perlast G75B in the UK?

Both compounds are supplied in the UK by independent FFKM seal specialists carrying multiple manufacturer lines. Lead time is typically 2-5 working days for stock BS 1806 / AS568 sizes, 4-8 weeks for custom-moulded sizes.

Independent UK engineering trade publication. Company profiles cross-referenced with Companies House.

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