- Effective on all metals except aluminum and stainless steel
 - Compatible with all common plumbing solder alloys
 - Will not turn copper piping green
 - Good for large diameter copper piping
 - 100% lead-free paste flux cleans and fluxes copper piping to provide uniform solder flow
 - Petroleum base provides cleaning effectiveness
 - NSF standard 14 (performance) and standard 61 (health effects) certified
 - Material is safe for use in potable water applications
 - Includes brush for easy flux application
 
                                 
                                
                                    
Oatey® No. 5 Paste Flux is a petrolatum-based flux designed to provide superior wetting properties for better solder flow. It can be used with most soft solders.