Blue Monster industrial-grade thread-sealing compounds are available in convenient 2-oz. squeeze tubes and are ideal for any toolbox or storage bin. Two formulas are available — with and without PTFE — to seal threads on all metals, PVC, CPVC, ABS and nylon-plastic pipe systems. Both formulas feature a slow-drying, soft-setting and nonhardening compound designed to improve sealing of threaded pipe systems, especially when poor-quality threads are an issue. Both formulas are lead-free, nontoxic and will not harden or separate in the tube.