A solvent-type asphalt mastic vapour barrier coating designed to provide superior vapour barrier and weathering characteristics. Adhesion and chemical resistance are excellent. Available in spray, trowel or airless spray grades. Used as a heavy-duty coating over rigid thermal insulation on tanks, lines and equipment where operating temperatures are below ambient summer temperatures. May also be used with heated equipment where thermal insulation is dry during application and the coated face is not subjected to temperatures above 95°C (203°F). May be used as a bedding compound for cavity wall insulation where a vapour barrier is required.