Hengshui Rongwei Rubber Factory

Description of Water swelling strip The bentonite strip is a green flexible hydrophilic strip of approx. 25 x 20 mm, made of natural sodium bentonite clay and synthetic rubber. The bentonite strip comes in lengths of approx. 5 metres. Due to shrinkage of the drying concrete, small cracks and voids will appear in the construction and cold joints, through which water can penetrate. In contact with water the green bentonite strip will swell approximately 400 % of its original dry volume. The expansive clay mass will seal the cracks and small voids in the joint. The first expansion is delayed to prevent the strip from expanding to soon in contact with rainwater during the installation. Advantages of Water swelling strip: 1. It is permanently active system, which swells up to approximately (150%~300%). 2. It is an ecological and user friendly system: simple and quick to install by means of gun nailing. 3. The composition of bentonite water-stop prevents premature swelling. 4. The water-stop has a proven track record in water treatment plants, water purification plants, water tanks, metro works and other concrete structures subject to high water pressure Features of Water swelling strip 1.It is designed to seal the opening gap of joints by water absorbing and volumetric swelling. 2.It shows good swelling properties even when in contact with sea and cement water due to the low swelling rate to prevent concrete cracks caused by swelling pressure. 3.Excellent physical properties and compression set. 4.It is flexible enough to follow any corners.