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Propylene glycol and Dipropylene glycol are derived from the same chemical process, adding water to propylene oxide. However, the molecular structure and chemical composition of each is very different.
Read MoreThe American Society of Testing and Materials (ASTM) guidelines state that a pipe sealant should be used on all threaded pipe joints, and Teflon tape is one such sealant. Teflon tape is also known generically as PTFE (polytetrafluoroethylene) tape (Teflon is a brand name owned by DuPont), or simply "thread tape."
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