Thread seal tape

The tape is sold cut to specific widths and wound on a spool, making it easy to wind around pipe threads.

It is often used to correspond to color coded pipelines (US, Canada, Australia, and New Zealand: yellow for natural gas, green for oxygen, etc.).

Also, internal overhangs of loose material may constrict a joint or slough off and form a foreign body that could jam a valve seat.

[citation needed] Therefore, using tape as a thread sealant is generally not considered appropriate in fluid power (hydraulic) systems.

Overheating (550° Fahrenheit, or about 288° Celsius)[11] and subsequent decomposition of Teflon can produce perfluoroisobutene which is 10 times as toxic as phosgene.

Chemours, owner of the Teflon trademark, no longer manufactures any thread seal tape,[12] and objects to this practice.