West System 410 Microlight 410 Microlight is a low density filler that is ideal for making light and workable epoxy. THe compound is perfect for fairing large areas. Microlight mixes easier than other fillers or microballoons. Easier to sand after the 105 Resin EpoxyHardener mixture with Microlight cures. Epoxy that has been thickened with Microlight will feather to a fine edge and is more economical for larger jobs. Not recommended for surfaces that will be subjected to high temperatures or to