Mastic asphalt, when used on underground structures, provides a continuous waterproof lining or ‘tanking’ to walls, floors and foundations, constructed in direct contact with the earth. In addition mastic asphalt is used for lining structures in water and sewage treatment works.
When fully confined it will provide an effective barrier to the transmission of water from the ground for the design life of the structure in which it is incorporated.
Acid resisting mastic asphalt taking can also be used to line bund walls and emergency catchment areas where corrosive liquids are involved.
Types of Mastic Asphalt
Mastic Asphalt for Tanking and Damp-proof Courses (limestone aggregate) BS 6925: 1988 Type T 1097.
Although Kitemarked and covered by BSI Certification the following grades are manufactured to within much narrower requirements than those set out in the British Standard Certification
Permanite Asphalt manufactures an Acid Resisting Grade of Mastic Asphalt Tanking for situations where contact with acidic substances would occur. Please contact Technical Services for more information.