PRO Synthrapol: A concentrated liquid wetting agent and surfactant compatible with all dye classifications. Use with PRO Dye Activator to scour fabric before dyeing. Also recommended for the final hot wash when using Fiber Reactive Dyes. May also be added to the dye bath to add levelness and aid in wetting out the fiber. * Will remove excess dye from hand dyed fabrics. * Will remove sizing from fabric before dyeing. * Use in the dye bath for even color. * A concentrated wetting agent, known as a surfactant.