ECO – MGR is recommended for the removal of unwanted magnesium from aluminium alloys. ECO – MGR decomposes when heated at 700- 800 degree celcius to release products which react preferentially with magnesium and remove it from the melt. Temperatures above 750 degree celcius are recommended for best reactivity. ECO – MGR has a slight fluxing action helping to clean the melt and dry the dross.