Pink High Density Teflon Tape is a type of thread sealing tape made from polytetrafluoroethylene (PTFE). It is often used in plumbing applications to seal pipe threads and prevent leaks. The tape is applied to the threaded portion of a pipe before it is screwed into a fitting. The tape helps to create a tight seal by filling in any imperfections in the threads and creating a smooth surface for the fitting to seal against. Pink High Density Teflon Tape is typically preferred over other types of thread sealing tape because it has a higher density, making it more resistant to compression and more effective at sealing.