This is the first environmentally friendly Flux Pen that can be refilled for a cost effective flux solution.Contains 10 ml of a NO-CLEAN SOLDERING FLUXSuperior fluxing ability with Instant wettingThis flux is free of any halides; resin; or rosin. This flux was designed for soldering high quality electronic printed circuit boards (PCBs); such as; through-hole; mixed technology; andsurface mount assemblies while eliminating the need for a post cleaning operation.Residues are Non-Corrosive and Non-Conductive. If removal of the residue is needed then it can be cleaned with warm water. Flux conforms to IPC-ANSI-J-STD-004; Type ORL0.This Product is RoHS Compliant.