Erosion of slopes can be avoided very well with entangled mesh structures, particularly during vegetation, because the soil which is filled into the three-dimensional static structure of the randomly entangled mesh is securely held in place and relatively resistant to washing out.

Separation is the placement of a flexible geosynthetic material, like a porous geotextile, between dissimilar materials so that the integrity and functioning of both materials can remain intact or even be improved. Paved roads, unpaved roads, and railroad bases are common applications.

Filtration and Drainage layers are used in civil applications to remove moisture or fine particles from the system. Geosynthetics provide a widely accepted, effective and economic alternative to traditional aggregate & sand filtration layers.