Get rid of leaks with this brush-top plastic jar of Leak LockĀ® from Highside Chemicals. It is a state-of-the-art high strength, pipe joint sealant consisting of chemically resistant film formers, plasticizers, reinforcing fillers, and solvents that is useable on all clean metal or plastic surfaces. The soft-setting pipe joint compound seals threaded joints, flanged joints, gasket surfaces, and mating surfaces. Ideal for metal and plastic materials subject to extreme vibrations, the resin-based brushable paste remains permanently flexible, adheres to internal surfaces, and fills voids.