Monokote® Type HPM Mortar is a single component, dry, powdery blend that is mixed with water to form a pourable trowelable material suitable for fire stopping openings in fire-rated walls and floors, such as those made for cable trays, electrical bus ways and multiple steel pipes or conduits. When cured, it forms a rigid, lightweight, non-combustible barrier against the spread of flames, when installed according to the AVI Firestop Installation Instruction or UL Fire Resistance Directory.