Orange-Eco® is an environmentally-safe paste flux product manufactured by Precise Alloys who has been providing quality solder products for over 85 years. Orange-Eco contains no zinc chloride, no ammonium chloride and no petrolatum. It is water soluble and produces minimal smoke and odor. It won’t freeze or separate and absorbs no water. It works on wet pipes, doesn’t pop when soldering, doesn’t burn skin or open wounds and it won’t turn your hands or your pipes black or green! Orange-Eco can even solder up to a 4” copper pipe without burning away.