The world’s choice for corrosion protection
GEOMET® 321 is applied to protect fasteners and many type of metallic parts from corrosion and is used in many industries. It can be combined with PLUS® DACROLUB® or GEOKOTE® topcoats to provide a very broad range of friction coefficients. It is the most widely used product in zinc flake technology.
• Thin dry-film, non-electrolytic
• Water-based chemistry
• Passivated zinc and aluminium flakes in a binder, patented chemistry
• Metallic silver appearance
Characterictics and performance*
• The coefficient of friction can be adjusted to targeted values ranging from 0.06 to 0.20 (ISO 16047) with NOF METAL COATING GROUP’s selected topcoats
• It can be used with or without topcoat
• No hydrogen embrittlement
• Excellent assembly and multi-tighteni ng behavior (with lubricated topcoat)
• Good mechanical damage (test method D24 1312, USCAR 32) and chemical (test VDA 621-412) resistance
• Performance maintained at elevated temperatures (up to 300°C)
• Paintable coating
• Electrical conductivity for most application processes
• Bimetallic compatibility with aluminum
High corrosion resistance*
Coating Weight Salt Spray Test (IS0 9227/ASTM B117) Cyclic Test
> 24 g/m2 > 240 hours without white rust > 720 hours without red rust
> 24 g/m2 + topcoat > 720 hours without red rust 4 cycles ACT 60 cycles GMW 14872 60 cycles SAE J2334
> 36 g/m2 > 1000 hours without red rust
*Results may vary depending on substrate, geometry of parts and type of application processes
Application process
GEOMET® 321 can be applied by Dip-Spin, Spray, Dip-Drain-Spin using bulk or rack
Health and Safety
• Aqueous dispersion
• Complies with REACh
• Complies with the 2000/53/CE and 2002/95/CE directives
Among our worldwide specifications
• BMW (GS 90010)
• CHRYSLER (PS-5873, PS-9666)
• DAIMLER (DBL 9440)
• FIAT (Capitolato 9.57513)
• FORD (S438)
• GENERAL MOTORS (GMW3359-GMW14)
• IVECO (18-1101)
• PORSCHE (PN 11011)
• RENAULT (01-71-002)
• RENAULT Trucks (01-71-4002)
• VOLKSWAGEN (TL245)
• VOLVO Cars (VCS 5737,29)
• ALSTOM (DTRF 150213)
• BOMBARDIER (BT/CE-WN30-02)
• CATERPILLAR (1E1675G)
• JOHN DEERE (JDM F13)
• KNORR BREMSE (N12005)
International standards
EN ISO 10683 – Fasteners: non-electrolytic zinc flake coatings
EN 13858 – Non-electrolytic zinc flake coatings on iron and steel parts
ASTM F1136 / F1136 M – Zinc/Aluminum Corrosion Protective Coatings for Fasteners
