WEST SYSTEM 410 MICROLIGHT™ FILLER - 410 Microlight is the ideal low-density filler for creating a light, easily-worked fairing compound especially suited for fairing large areas. Microlight mixes with greater ease than 407 Low-Density filler or microballoons and is approximately 30% easier to sand. It feathers to a fine edge and is also more economical for large fairing jobs. Not recommended under dark paint or other surfaces subject to high temperatures. Cures to a tan color. Sold by the 2 oz. Can, 5 oz. Can or 4 lb. Bag.