Delay-Swelling Composite Rubber Strip – Controlled Expansion Seal for Complex Concrete Structures

Product Overview This delay-swelling rubber strip combines a hydrophilic core with a coated outer layer to delay expansion during the construction phase. It is ideal for areas prone to early water exposure.

Features Controlled delay before swelling begins Reduces premature expansion risk Composite structure with reliable sealing Retains elasticity after expansion.

Technical Specifications Core: Hydrophilic rubber; Coating: Polyethylene or EVA Expansion Delay: 48–72 hours Full Expansion: 200–300% Sizes: 20×10mm, 30×5mm, 25×8mm Temperature Resistance: -30°C to +70°C Compression Strength: ≥ 2.0 MPa.

Applications Rain-prone construction zones Tunnel boring machine (TBM) segments Wastewater treatment structures Lift pits and sunken basements.

Customization Options Delay time adjustable via coating Multiple shape profiles per project Pre-welded corners or T-sections Branding and QR code printing.

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.