Shenzhen Xunzhi Building Material Industry Co., Ltd.
0 gap sealing rubber strip canbe used for 15 years
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Double Layer Swelling Waterstop Strip Sequential Expansion for Multi Stage Waterproofing
Product Overview This advanced water swelling rubber strip features dual expansion zones for staged sealing in high-risk water ingress zones such as multi-layered tunnel linings or utility shafts.
Features Two-stage expansion structure Primary and delayed sealing zones Resists premature expansion High pressure sealing performance.
Technical Specifications Material: Dual-core swelling rubber Primary Expansion: 150–200% Delayed Zone: 48–96 hrs delay; 250–350% swelling Size Options: 30×10mm, 25×12mm Service Temp: -30°C to +80°C.
Applications Shield tunnel segment joints Multi-layer utility tunnels Shaft walls and watertight compartments Critical leak-prone cold joints.
Customization Options Tailored expansion timing per zone Special profile extrusion Multi-color coding per function Pre-assembled kits.