410 Microlight™: 410 Microlight is the ideal low density filler for creating a light, easily worked fairing compound especially suited for large areas. Microlight is easily blended into the epoxy mix at additions between 7% to 16% by weight and when cured is easier to sand than any other filled system. Holds a feather edge, and is more cost effective then other fillers. It is not recommended that epoxy/410 mixes should be overcoated in dark coloured paints. Cures to a light tan colour.