Bentonite mats

arrow Characteristics:

    This type of insulation is made by joining three components: Layer of bentonite granulate placed between textile and polypropylene unwoven fabric. Combining insulation into a uniform product is ensured by patented stitching process which encompasses catching fibres from the bottom woven fabric with special needles and pulling them through a layer of bentonite outside the fabric which results in mutual binding of geotextiles and closing and pressing of bentonite. Available in several types, can be additionally laminated with polymer membrane from the geotextile side. Versions: from 4000 to 5600 g/m2. A bentonite mat is used mainly in ground construction and in environmental protection as water barrier for protection of soils and underground water.


  • Sealing landfill sites (construction of new objects and recultivation of existing ones).
  • Sealing levees.
  • Sealing reservoirs and earth dams.
  • Sealing ducts.
  • Sealing of road and railway subgrades in protected areas.
  • Sealing of storage facilities for oil-derivatives and others.

  • Self-sealing features.
  • Possibility of performance errors limited to minimum.
  • The material’s efficiency is unlimited in time.
  • Installation is possible virtually in any weather conditions with the exception of pouring rain and very strong wind.
  • Easy and quick installation. Does not require special equipment.

  • arrow Auxiliary and supporting materials:

      Bentonite granulate is granulated bentonite in clear form used in the insulated surface in areas where increased quantity of bentonite is necessary or for preparation of bentonite putty (overlaps, installation passages).

    arrow Installation:

      Bentonite mats are easy and quick to install. The base for the mat should be sufficiently compacted, level, free of debris, roots, sharp rocks, ice and still water. The mat should be placed with overlaps of 15 to 23 cm. Place a continuous layer of bentonite granulate of 0.4 kg/rm (remove any impurities and loose soil first) in the overlap zone. The edges of the mat should be flattened, without creases and bends. Place a bentonite mat with unwoven fabric (white side) facing the base when starting installation on slope. Unfold the strips from the highest to lowest point and avoid tensioning or stretching them. Eliminate any creases, bends and “fish lips” at edges. Top edge of the strip should be anchored. When joining strips of mat on slopes the overlaps should be made using roofing-tile method. This will prevent polluting the overlap during filling. The strips laid on the horizontal surface can be oriented in any way. Cover the mat after placement with min. 30 cm layer of soil or aggregate. The covering material should be free of sharp rocks over 5 cm in size.

    arrow Comments:

    • Due to significant weight of the mat use equipment that enables free suspension and unfolding of reel using a spreader beam and rigid pipe inserted into the reel.
    • The material for covering the bentonite mat must not have high lime content. This also applies to mat base.

    arrow Market form:

      Bentonite mats are supplied in reels: 4 to 5 m x 40 rm. Strips of mat are wound on 10 cm dia. core. We can also make reels with different lengths.

    arrow Storage:

      The reels should be placed on a dry and sufficiently level surface. The reels should be stacked, usually not more than 5 layers (the height of a stack should not exceed the height of safe operation of unloading devices). The reels should be protected against rain with a plastic cover or impregnated tarpaulin.

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