Product Description Oatey H-205 Paste Flux is a water flushable soldering paste flux designed to clean and flux most commonly soldered metals. 100% lead free. Safe for use on potable water applications. Can be used on copper piping without discoloration. Excellent for large diameter - copper pipe applications. Oatey products have earned the trust of plumbing professional for over 100 years. Made in the USA. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry