The PropOne Activator is a specialized 60ml component used as part of a 4:1 etching primer system. When mixed with the PropOne Primer Coat, it chemically dries to protect metallic surfaces against corrosion while enabling the adhesion of the PropOne Clear Coat. This formula is suitable for both ferrous and non-ferrous metals. Volume: 60ml System: Component of a 4:1 etching primer system Compatibility: Suitable for use on both ferrous and non-ferrous metallic surfaces Note: This product is the Primer Activator only; other components of the PropOne foul-release system are sold separately. PropOne is a non-toxic, foul-release coating system designed to keep propellers and underwater running gear clean by preventing sea life from adhering to surfaces. Its slick, non-stick finish is engineered to provide protection for one to two years in water.