Filament geotextile is used in isolation layer because of its excellent filtering ability. The effectiveness of geotextile isolation layer has been used in many projects done by customers before. Geotextile isolation layer is used in railways, highways, airports, various runways, water conservancy projects, and repair projects. There are many construction examples of filament geotextile isolation layer. The geotextile isolation layer itself has high strength, aging resistance, corrosion resistance, insect resistance, and strong adaptability. Geotextile is divided into woven and non-woven products, but they are all geotextile isolation layers. The thickness of the isolation layer depends on the construction needs.

In some water conservancy projects, once the impurity particles in the water are stored in the geotextile fiber net, the problem of blockage will occur over time, and the filtration and isolation effect of the geotextile will decrease.

Aging is also one of the problems faced by geotextiles. Natural forces may cause the geotextile isolation layer to gradually age. Depending on the construction process, raw materials, and anti-aging properties, the anti-aging properties of geotextiles are also different.

In the case of insulation damage, the effectiveness of the geotextile was similar to that of the substrate (80%).