Abstract: A self-repairing and self-sealing waterproof membrane, for insulating built structures subjected to hydrostatic pressure, includes a first layer of hermetic polymeric material, which covers a second layer of water-expanding polymeric material, in which additives of polymeric and/or mineral origin are added, arranged in contact with the concrete surface of the structure. The second layer includes a plurality of sublayers which are contiguous and have different expanding actions and mechanical characteristics. The membrane has substantially the shape of a continuous flat sheet, which gives the membrane the appearance of a uniform film, having a thickness between 0.2 and 5.0 mm and being composed of one or more of the following polymers: TPE, TPO, TPU, EVA, EPDM, EPM, HDPE, MDPE, LDPE, PE, PVC and other elastomeric or polymeric polymers, containing optional additions of fillers and other ingredients to give the article the necessary requirements of workability, mechanical strength, and durability.

Abstract: A self-repairing and self-sealing waterproof membrane, for insulating built structures subjected to hydrostatic pressure, includes a first layer of hermetic polymeric material, which covers a second layer of water-expanding polymeric material, in which additives of polymeric and/or mineral origin are added, arranged in contact with the concrete surface of the structure. The second layer includes a plurality of sublayers which are contiguous and have different expanding actions and mechanical characteristics. The membrane has substantially the shape of a continuous flat sheet, which gives the membrane the appearance of a uniform film, having a thickness between 0.2 and 5.0 mm and being composed of one or more of the following polymers: TPE, TPO, TPU, EVA, EPDM, EPM, HDPE, MDPE, LDPE, PE, PVC and other elastomeric or polymeric polymers, containing optional additions of fillers and other ingredients to give the article the necessary requirements of workability, mechanical strength, and durability.