NA-SUL 437 is a unique, water soluble rust preventive concentrate. It can be cut back in either cold or warm water to provide a transparent water and additive solution. NA-SUL 437 has excellent hard water tolerance and exhibits exceptional storage stability both as the concentrate and in water solution formulations. NA-SUL 437 deposits a thin film on metal parts that becomes hydrophobic upon drying, enabling parts to resist rusting for extended periods, even in the 100% humidity environment of the Humidity Cabinet (ASTM D1748) test.

The thin protective film is removed easily with alkaline cleaners.

Water solutions of NA-SUL 437 are ideal for dip application of metal parts for protection during indoor storage. Wet parts may be dipped in NA-SUL 437 solutions, replacing the need for solvent based dewatering fluids. NA-SUL 437 is also highly recommended for in-can protection for waterborne aerosols keeping the interior of metal cans rust-free.

Metal Type Ashless
Metal Content 0%
Viscosity @ 40°C 300 cSt
Application Advantage Rust inhibition
Application Advantage Humidity resistance
Application Advantage Thin film
Application Advantage Fast drying
Application Advantage Easy removal
Application Advantage Sprayable
Application Advantage Multi-metal protection
Application Advantage Storage stability
Application Advantage Forms clear solution
Formulation Advantage Water soluble
Formulation Advantage Ashless
Formulation Advantage Waterborne
Formulation Advantage Easy to handle
Market Application Rust preventive
Product Group Rust preventive