The 1621-10S is an E-Line Flux Remover removes flux residues and other contaminants left by manufacture, rework or repair of printed circuit boards. Residues from higher, lead-free temperatures are more baked on and harder to clean. G3, Ecoline and Precision-V flux removers have been proven very effective at removing fluxes baked on at lead-free temperatures. Micro components and fine pitch leads are delicate and easily damaged, so brushing and scrubbing should be avoided if possible. Both G3, Ecoline and Precision-V have a powerful spray and strong solvent that blasts off residues and cleans areas under components that a brush cannot touch. It is in the form of clear colorless liquid with characteristic hydrocarbon odor.