Professional plumbers primarily use high-density PTFE tape (such as pink water tape or yellow gas tape) and liquid pipe dope (thread sealant paste) to seal threaded pipe connections securely. For heavy metal pipe threads and high-pressure industrial installations, plumbers frequently apply a combination of both tape and liquid pipe dope to ensure maximum thread engagement, lubrication, and leak prevention. These products work by filling the tiny spiral gaps between male and female threads, creating a durable barrier against water and gas pressure while preventing metal-on-metal galling during the tightening process.
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