Bentonite cord 20x30 mm for waterproofing and sealing construction joints. Bentonite cord "Gidrostop" 20x30 mm is made of sodium bentonite, which swells under the influence of water. Bentonite is a natural clay mineral that swells and increases in size when in contact with water. In a confined space, it creates tension that reduces water permeability, even in the presence of cracks and porous areas in concrete. Due to this, it is the optimal material for reliable waterproofing of concrete structures.
Bentonite cord 20x30 mm for waterproofing and sealing construction joints
Bentonite cord "Gidrostop" 20x30 mm is made of sodium bentonite, which swells under the influence of water. Bentonite is a natural clay mineral that swells and increases in size when in contact with water. In a confined space, it creates tension that reduces water permeability, even in the presence of cracks and porous areas in concrete. Due to this, it is the optimal material for reliable waterproofing of concrete structures. Excellent technological performance and simple installation method make it possible to use the product as an insulating material for joints in underground construction, on hydraulic structures and in civil engineering.


| Density | 1.5 g/cm3 |
| Color | Red |
| Packaging | Rolls of 5 m |
| Boxes | 40 m (8 rolls) |
| Flexibility on a beam with radius R | 25 mm |
| at temperatures of minus 30 °C | no cracks |
| at temperatures of plus 50 °C | no cracks |
| Volumetric expansion after exposure to water, % | -after 24 hours: 25 -after 48 hours: 80 -after 7 days: 210 |
| Breaking force during stretching, N, not less than | 18 |
| Compared elongation at break, % not less than | 25 |