Oatey #5 paste flux is a petrolatum-based flux designed to provide great wetting properties for better solder flow. It can be used with most soft solders, 100% lead-free and safe for use on potable water applications. #5 paste flux’s formula prevents copper piping turning green and is excellent for large diameter copper pipe applications. Oatey products have earned the trust of plumbing professionals for over 100 years.

• Effective on all metals except aluminum and stainless steel
• Compatible with all common plumbing solder alloy
• Will not turn copper piping green
• Good for large diameter copper piping
• 100% lead-free paste cleans and fluxes copper piping
• Petroleum base provides cleaning effectiveness