Hydrophilic Swelling Rubber Waterstop  Sealing Strip for Precast Concrete Elements

Product Overview This hydrophilic rubber waterstop is ideal for precast concrete joints. It expands on contact with water, creating an active sealing barrier that adapts to small cracks and irregularities within the concrete.

Features Active expansion on wet conditions Maintains shape in dry state for construction Long-lasting sealing function Flexible for curved and angled joints.

Technical Specifications Material: Hydrophilic polymer-modified rubber Expansion Rate: 200–300% Standard Dimensions: 20×5mm, 25×10mm, 30×7mm Hardness: Shore A 40–70 Water Pressure Resistance: ≥ 0.5 MPa Working Temperature: -25°C to +80°C.

Applications Precast box culverts and segments Concrete pipe penetrations Manholes and sewer junctions Bridge decks and abutments

Customization Options Tailored width and thickness Co-extrusion with delay layer Roll or strip supply format OEM printing on surface