This strong cleaner is engineered to clean heavy, aged fluxes that no other cleaner can touch. Economical. Works on R, RA, RMA and no-clean fluxes, even high temperature lead-free solders, plus pastes, inks, fingerprints, oxides, silicones, oils and grease. - Strong and Economical! The Polar Flux Remover from MicroCare is engineered to clean heavy, aged fluxes that no other cleaner can touch. Polar Flux Remover is an economical defluxer that works on R, RA, RMA, and No-Clean fluxes for both tin/lead solders and high temperate lead-free solders. It removes polar and ionic activators with fast, extra-strength cleaning. It also is an excellent silicone remover. This cleaner quickly penetrates and dissolves white residues and dries residue-free. It also removes all types of pastes, inks, finger prints, oxides, oils and grease. Use Polar Flux Remover on printed circuit boards, FR-4, components, connectors, cables, and mechanical assemblies. Test before use on softer plastics. Flammable