PASTE FLUX WATER SOLUBLE 4OZ Specifications: Compositions: Ammonium Chloride Glycerin Triethanolamine Hydrochloride Zinc Chloride Includes: Brush Oatey H-205 water soluble Paste Flux cleans and fluxes most commonly soldered metals including copper brass zinc galvanized iron lead and tin or copper-coated metals. Fluxing is a critical step in the soldering process. H-205 Paste Flux is lead-free and ideal for copper systems including fire sprinkler hydronic heating potable water service and DWV piping. H-205 Paste Flux remains active up to 700 deg F. H-2O5 Flux complies with CA and VT lead content regulations.