Canrez CRZ-660 vs Chemraz 615 Comparison

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Reviewed by MLC Editorial Team | 7 June 2026

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Canrez CRZ-660 and Chemraz 615 are both perfluoroelastomer (FFKM) compounds used in chemical, refinery, and process applications. Canrez CRZ-660 vs Chemraz 615 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	Canrez CRZ-660	Chemraz 615
Manufacturer	Canyon Components	Greene Tweed
Compound	CRZ-660	615
Maximum continuous temp	325°C	324°C
Minimum temp	0°C	-10°C
Hardness	75 Shore A	75 Shore A
Colour	Black	Black
Typical applications	Chemical, refinery, pharmaceutical	Refinery, chemical, hot amines, steam

When to specify Canrez CRZ-660

Canrez CRZ-660 suits chemical and similar service. Continuous temperature window is 0°C to 325°C, hardness 75 Shore A. Manufactured by Canyon Components.

When to specify Chemraz 615

Chemraz 615 suits refinery and similar service. Continuous temperature window is -10°C to 324°C, hardness 75 Shore A. Manufactured by Greene Tweed.

Key differences

Temperature ceiling: Canrez CRZ-660 runs 1°C hotter (325°C vs 324°C). Specify the higher-rated compound when continuous service is above 324°C.
Hardness: Both are 75 Shore A, so groove design and squeeze percentage are interchangeable.
Manufacturer: Canrez CRZ-660 is from Canyon Components; Chemraz 615 is from Greene Tweed. 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 Canrez CRZ-660 vs Chemraz 615 Comparison

Acumen Seals & Pumps - UK specialist in mechanical seals, FFKM O-rings, Kalrez compounds, and elastomer parts. 36 years of inventory, UK stock with 24-48 hour despatch, and a price back within 4 working hours.

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Related pages

References

Canyon Components - Canrez CRZ-660
Greene Tweed - Chemraz 615
BS 1806
ISO 3601

Frequently Asked Questions

Can I substitute Canrez CRZ-660 for Chemraz 615?

Yes, Canrez CRZ-660 and Chemraz 615 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: Canrez CRZ-660 or Chemraz 615?

Canrez CRZ-660 has a higher continuous temperature ceiling (325°C vs 324°C, a 1°C difference).

Which costs less: Canrez CRZ-660 or Chemraz 615?

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 Canrez CRZ-660 or Chemraz 615 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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