Oatey 1.7-fl oz Water Soluble Soldering Flux

Effective on most metals, excluding aluminum and stainless steel. Compatible with common plumbing solder alloys. Can be used on copper piping without discoloration. Good for large diameter copper piping. 100% lead-free paste cleans, fluxes and copper piping to provide uniform solder flow. Meets ASTM standard B-813. NSF standard 14 (Performance) and standard 61 (Health effects) certified. Safe for use in potable water applications.