RectorSeal 1.75 oz. Tru-Blu Vibration Resistant Pipe Thread Sealant, designed for sealing vibration-prone NPT connections. Ideal for galvanized steel, iron, brass, copper, aluminum, stainless steel, PVC, polyethylene, and reinforced fiberglass, this fast-dry, flexible set thread sealant is enhanced with PTFE for improved thread lubrication during assembly and break-out. Certified to NSF/ANSI 61-G, it offers a positive lock and seal on threaded fasteners, making it suitable for various industrial and refrigeration applications. Comes in a convenient 1.75 oz. pack.