PTFE is the original fluoropolymer. A fluoropolymer being a compound with a Fluorine atom in it. PTFE has excellent low friction properties and non-stick properties.
Although PTFE does have more porosity than other coatings in the fluoropolymer family as a rule, it does have a long and successful track record. Dry lubrication is a key performance area, either on its own or mixed with other dry lubrication coatings such as Graphite or Molybdenum Disulphide. PTFE is harder than its sister fluoropolymers PFA and FEP.