Oatey® No. 95 Tinning Flux is a petrolatum-based flux containing tinning powder to help pre-tin the pipe. It cleans, tins and fluxes most commonly soldered metals. 100% lead free, No. 95 Tinning Flux is NSF listed for potable water applications. Its formula resists turning copper piping green and is excellent for large diameter copper pipe applications. Made in the USA. Oatey products have earned the trust of plumbing professional for over 100 years.