The Bostik Cementone Bituminous Mastic is a versatile and reliable sealing solution, designed for use in a variety of construction and repair tasks. This 2.5-litre bituminous mastic provides an effective barrier against water penetration, making it ideal for waterproofing and sealing jobs. With its high adhesion property, it bonds strongly to a wide range of surfaces including concrete, metal, and more. Its black finish gives a neat appearance when used in visible areas.