Loctite® Extend Rust Neutralizer is a fast drying, milky white latex coating that is applied to rusted metal to stop rust, protect the surface and act as a primer for the finish coat. It converts rust to a neutral surface ready for painting. Dries to produce a tough polymer surfaceCured color on substrate is black.Extremely effective on mild surface rustSets in 20 minutes per coatSeals rust and creates a neutral surface that is ready for priming and paintingLiquid formulationConverts surface rust and prevents rust from spreading..Three coats are required. Second application should cure for 24 hours before third coat.Working time is 30 minutesColor when applied is light bronw