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

Shenzhen Xunzhi Building Materials Industrial Co., Ltd. is an integrated enterprise specializing in design, production, and sales, with many years of experience in manufacturing and technical product development. The company has two subsidiaries: Hong Kong Ruisong Technology Co., Ltd. and Sanya Ruisong Technology Co., Ltd. It is a professional manufacturer of door and window seals, curtain wall seals, and vehicle door sealing strips, providing one-stop rubber sealing solutions to global customers for many years.

We specialize in the production and processing of various sealing and molding products, including PVC (Polyvinyl Chloride), EPDM (Ethylene Propylene Diene Monomer), high-grade thermoplastic rubber (Santoprene), silicone rubber, dual-hardness sealing strips, rigid decorative strips, EVA single- and double-sided adhesive products for doors, windows, and curtain walls, as well as molded parts and plastic-rubber injection components.

The company is equipped with a strict quality assurance system, comprehensive testing procedures, and excellent after-sales service. Our products are highly recognized and praised by industry professionals, and are exported to Europe, America, Southeast Asia, and Hong Kong and Macao regions.