Ammonium fluoroborate is widely used in the metal finishing industry as a flux for soldering and brazing. It helps to remove oxides from metal surfaces, ensuring strong and clean joints.

In the electronics industry, it serves as an essential component in the production of printed circuit boards, where it aids in the etching process to create precise circuit patterns.

Additionally, it is utilized in the manufacturing of abrasives and grinding wheels, enhancing their durability and performance.

In the field of glass and ceramics, it acts as a flux to lower the melting point of materials, improving the quality and finish of the final products.

It is also employed in the synthesis of certain chemical compounds, particularly in organic chemistry, where it acts as a catalyst or reagent in various reactions.

Lastly, it finds application in the textile industry as a flame retardant, providing safety by reducing the flammability of fabrics.

Additionally, it is used in metal coating processes to enhance corrosion resistance and as an additive in electrolyte solutions for electroplating. In the ceramics industry, it is used as a component in glazes to improve thermal properties and durability of ceramic products.