A lightweight pre-mixed gypsum based Firestop Compound in white dry powder form, readily mixed with water on site to produce a plaster like material for seal around service penetrations. The firestop compound is fast drying, economical with the highest yield per pound means lower installed cost. The firestop compound has a wide range of application, that includes aluminium cable tray, medium to large opening through common constructions, loose cable for power, voice, data, bus ducts and multiple metallic conduits and tubing. It is available in white or red colour. It also quick setting and easy to apply reduce the cost and time-consuming.