Most commercially melted metals react strongly with oxygen to form oxides during the melting process. These oxides along with dirt, oil and refractory particles, etc. must be removed from the metal before casting to avoid defects.

Many molten metals are also susceptible to absorbing gases (for example - hydrogen gas in aluminium) which must also be controlled.

Fluxes have been used for these purposes since metal melting began, to improve the quality of metal and to increase the efficiency of melting. Over recent years, the continuing need to improve the environmental conditions in foundries has led to an emphasis on reduction of dust, fume, etc. in the workplace.

Furthermore the development of the ECOFLUX range of low-fluoride and fluoride free fluxes provides a cost-effective, environmentally superior system of treating aluminium alloys.