Krytox™ TS4 Thread Sealant is unlike PTFE tape, which should be removed before re-application. Krytox TS4 can be re-applied over existing Krytox thread sealant. It clings to threads and will not shred or tear on assembly/disassembly. It won't plug or restrict critical piping, valves, or instruments like tape solids. Krytox TS4 is non-reactive, non-toxic, non-flammable, non-corrosive and compatible with most seal, O-ring, and valve polymers. No VOC content or hydrocarbon is in the product and is safe for oxygen use. It lubricates the threads, preventing costly thread damage from galling and seizing during assembly and allows low breakaway torque for easy-to-break connections.