The company began supplying fluxes for copper and aluminium alloys. With the advent of tabletted degassers (1939) and grain refiners (1942) Foseco revolutionised the treatment of aluminium melts.

The development of easy to use vacuum packed sodium metal in 1956 was a major advance for the foundryman. The handling and application of sodium metal until this time was hazardous and difficult to control.

More recent times have seen the focus shift to improving the environment and process control with the development of rotary degassing (1987), more efficient granular fluxes (1990) and the Melt Treatment Station (1996).