Geosynthetic clay covers produced by encapsulating bentonite-based raw material between woven and non-woven geotextiles are used to provide impermeability. They can be produced in powder and granular form. Their impermeability is high. CETCO Bentomat, Naue Bentofix, Laviosa and Maccaferri Macline products, which are geosynthetic clay covers that are frequently used in artificial pond applications, building foundation insulation and solid waste landfill facilities (landfill), are equivalents of each other and are frequently used.