It is a loose sand material with a moisture content of 1-3%, consisting of silica sand (up to 85%) and mixed bentonite (bentonite + carbonaceous substances, up to 10%). Approximately 900 t/year is produced. It is stored outdoors, on an open area without a roof. Loading is possible in the case of taking a maximum of 1-2 trucks, otherwise you need to ensure loading at your own expense. Certification for use in beds for water and sewage pipes.