ThermoFlow Green-Type Solder Flux PasteCleans and de-oxidizes the surface, enablingthe solder flow smoothly and ensuring it adheres to the surface of the object being soldered.This flux is water soluble so it can be removed with water after soldering, unlike othertypes which requireVOC’s (Volatile Organic Compounds) for removal.Can be used on steel, iron, plated zinc and plated nickel.Meets RoHS directives (lead free)Therm-O-FlowTF127121