• Precision Finishing Inc.

What Is The Difference Between A Rust Inhibitor And A Rust Preventative?

Updated: Apr 17, 2019

We define a rust inhibitor as a water-based, clear product that is typically used to keep parts from rusting in between processes. Rust inhibitors offer short-term protection for up to 30 days; however, ambient humidity levels can play a factor in the actual life of protection.


Cast iron chips in 5% Chemtrol 578 Corrosion preventative after one day (Left). Cast iron chips in soft water with no inhibitor after one day. (Right)

In most cases, no additional cleaning is required before painting or secondary operations. To apply a rust inhibitor the part is either sprayed or dipped.


Chemtrol® rust inhibitors and rust preventatives are available in various size containers.

A Chemtrol® rust preventative is a petroleum oil-based product which will protect for six months to a year. The part is typically run through a dipping operation to apply the preventative. Drying times are part and application dependent. In most cases, Rust Preventatives need to be removed before painting and secondary operations.


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