GEOMET Coating Systems
GEOMET is a chromium-free zinc/aluminum flake coating family. It replaced DACROMET in most applications.
How to specify it
| Coating family | Zinc flake (ASTM F3393 / ISO 10683) |
|---|---|
| Maker | NOF Metal Coatings |
| Specify | Exact system: basecoat + topcoat + any lubricant |
| Why it matters | Friction and corrosion differ between grades of the same brand |
| Common versions | GEOMET 321, 500 (with integral lubricant), 720 |
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Text version of this sheet
GEOMET · proprietary zinc-flake coating system (NOF Metal Coatings)
What it is
FIELD IDENTIFICATION
GEOMET is a chromium-free zinc/aluminum flake coating family. It replaced DACROMET in most
applications.
GEOMET
GEOMET: proprietary zinc-flake system
How to specify it
Coating family
Zinc flake (ASTM F3393 / ISO 10683)
Maker
NOF Metal Coatings
Specify
Exact system: basecoat + topcoat + any lubricant
Why it matters
Friction and corrosion differ between grades of the same brand
Common versions
GEOMET 321, 500 (with integral lubricant), 720
Key points
A brand name alone is not a specification. Name the exact system and the performance required.
Governing standards: ASTM F3393-24; ISO 10683:2018; maker technical data. Editions shown are the latest confirmed as of September 2026. The drawing and the governing
standard always take precedence over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-A86B41 · thefastenerapp.com/fastener-guide/plating-coatings-finishes/geomet-coating-systems · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
