PAF (KAlF4) is a complex fluoride salt of potassium and aluminium. It serves as an alternative to conventional fluoride salts for a variety of applications.



  • Used as a fluxing agent in the smelting of secondary aluminium.
  • Used to reduce or remove the magnesium content of the smelt.
  • Glass producers use the PAF for opacification, or to cloud the glass, giving it a milky white color.


  • The addition of fluoride enhances the general performance of salt flux.
  • Improves metal purity.
  • Separates metals from oxide and dross and prevents incendiary burning of the aluminum.