The FORBENT S and FORBENT G are types of tape bands that swell up under the influence of humidity and groundwater, which are foreseen for the execution of horizontal and vertical seals of day joints required during concreting of concrete and reinforced concrete components. Swelling of these profiles depends to a great extent on the material, hydrostatic pressure and chemical properties of the liquid and the time of its influence on the band.
When taking in water into their cellular structure, the swell bands increase their volume. Properly concreted and embedded FORBENT swell bands, through size increase, fill up concrete pockets and cracks, insulating the day joint against further liquid penetration. In order for swell pressure, counteracting the liquid pressure, to be able to arise, it must be completely covered in concrete. Quick installation and no necessity to adapt the reinforcement and arrangement of day joints at the design stage put swell bands as an alternative for PVC bands.