Definition - What does Anti-sag Agent mean?
An anti-sag agent is a chemical substance that is added to a surface or mixed with a coating to prevent weakening of the coat due to gravity. The weakening due to gravitational forces is known as sagging.
Corrosionpedia explains Anti-sag Agent
Anti-sag agents are particularly useful for those applications that use dense coating paints because they are more affected by gravity. Anti-sag agents help prolong the coating's lifetime during and after application by preventing the coating from falling away from the corrosion prone surface to be protected.