Flux-Frei is a mild yet effective cleaner that easily removes even stubborn residues of soldering fluxes. It does not matter whether the fluxes are rosin-based or water-soluble. Flux-Frei is colorless and leaves no residue. It does not damage common materials. However, use on PVC and polystyrene should be avoided. Also available with a brush adapter for intensive cleaning. - Evaporates without leaving residue - Good material compatibility (except polystyrene, PVC) - Medium evaporation rate