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 resin-bonded abrasives for metal treatment Production of soldering agents: as component in fluxing agents for soldering and brazing