WALO has played a pioneering role in the field of bituminous asphalt seals for over 75 years with its various services in Switzerland and worldwide. Apart from sealing reservoirs, canals, landfills and dams, mastic asphalt seals are also part of our specialist department’s range of services.
In bituminous seal construction, the mastic asphalt seal acts as a thin protective layer or wearing course. It protects the seal below against UV radiation, amongst other things, thus making an important contribution to extending its service life. The mastic asphalt seal retains its protective function if replaced regularly as required. WALO evens out irregularities in the old layer during the repair of mastic asphalt seals and applies a new seal following thorough cleaning of the surfaces. As with complete repairs using milling machines, mastic asphalt can also be repaired if there is water below the surfaces to be repaired. Suitable barriers prevent the materials or any pollutants from entering the water.