Potassium fluoroborate (KBF4) is used in aluminium-metallurgy, for the production of abrasives, soldering agents and ceramics, and in the chemical industry.

Potassium fluoroborate is used in the the following applications:

• Aluminium-metallurgy: 
  as component in fluxing and grain refining agents 
  for aluminium and magnesium 
  as component in protecting salts for light metal castings 
• Production of abrasives: 
  as active filler in resinbonded abrasives for metal treatment 
• Production of soldering agents: 
  as component in fluxing agents for soldering and brazing