Definition - What does Leveling Agent mean?
A leveling agent is a chemical substance added to a paint or coating to enhance its thickness uniformity when applied to a corrosion prone metallic surface.
Corrosionpedia explains Leveling Agent
Leveling agents are used to prevent lumpy and uneven surfaces on a metal after a protective film dries and adheres to it. This is important because uneven surfaces can make it difficult to monitor the base surface conditions over time due to an elevated surface thickness, which makes corrosion more difficult to identify and rectify.