The products are made by soaking the base in bituminous or thermo plasticity elastomeror thermoplastics modified bitumenous, then covering double faces with elastomer(SBS)or thermoplastics(APP,APAO,APL)modified bitumenous, and last finishing the upward face with fine sands, mineral slates(or grains)or polythene membrane while downward face with fine sands or polythene membrane. 100mm*10m
