Abstract: The invention relates to an isolation material, which is applied on the structures and surfaces where it is desired to provide isolation, in order to prevent the possible deformation by protecting said structures and surfaces against external factors, said isolation material being produced to extend the lifetime of the isolation by using the liquid, moisture and vapor impermeability feature of the plastic-derived material constituting the intermediate layer (2), and to obtain the possibility of rapid, easy and economic application and use for the bitumen (asphalt) (4) coated using the fibrous material (3). Said isolation material (1) is not easy to burn, is not affected by the temperature differences and is not influenced for a very long time by the factors such as sun, rain, snow, naturally occurring chemicals, plant roots, direct contact with the soil and time; hence it enables the isolation to last for long years.