Non-Explosive Demolition Agent / Expansive Mortar(HSCA) Operation Manual and Precautions Expansion agent should not be exposed to direct sunlight or moisture, and must be storedin a well-ventilated and cool place. When stirring, use flowing water, as stagnant water canbecome very hot when exposed to sunlight. Always wear protective goggles duringoperation. Before grouting, measure the temperature inside the hole, ambient temperature,water temperature, and temperature of the