Hangzhou Bright Rubber Plastic Product Co., Ltd. is one of the leading manufacturers and suppliers of water swelling rubber waterstop in China. If you're going to buy water swelling rubber waterstop made in China, welcome to get more information from our factory. We also accept customized orders.
Material & Swelling Mechanism
This waterstop strip is made from a rubber compound blended with hydrophilic materials, typically sodium bentonite or super-absorbent polymers. When water contacts the strip, these hydrophilic agents absorb the moisture and expand, causing the entire strip to swell in volume by 150% to 600%. This expansion fills the gap in the concrete joint and creates a watertight seal. Unlike traditional rubber waterstops that rely purely on compression, this material actively reacts to water ingress, sealing the joint from the inside out.
Waterstop Sealing Performance
The primary function of this strip is to prevent water penetration through concrete construction joints. When installed in the joint, the strip is compressed between two concrete surfaces. Upon contact with water, it expands and fills any voids or cracks that may develop. This creates a continuous, flexible seal that adapts to minor movements and settlements in the structure. The material is effective against both standing water and flowing water, making it suitable for basements, tunnels, and below-grade structures.
Chemical & Environmental Resistance
The rubber compound used in this waterstop offers good resistance to aging, oxidation, and a wide range of chemicals found in soil and groundwater. It remains stable in both fresh water and salt water environments, although the expansion rate may vary with water salinity. The material maintains its flexibility across a broad temperature range, ensuring reliable performance in cold and hot climates. It is also resistant to mold, bacteria, and common soil contaminants, making it suitable for long-term underground use.
Application Scope
This versatile waterstop strip is widely used in civil engineering and construction. It is commonly installed in concrete construction joints, expansion joints, and pipe penetrations. Typical applications include basements, underground parking garages, tunnels, subway stations, water treatment plants, and retaining walls. It is also used in reservoirs, dams, and sewage treatment facilities where reliable waterproofing is critical. Available in various cross-sections and sizes, it can be tailored to specific joint dimensions.
Installation & Construction
The waterstop strip is easy to install and requires no special tools or equipment. It is typically fixed to the first concrete surface using nails, adhesives, or binding wire before the second pour. The strip should be positioned to ensure full contact with both concrete surfaces. It is important to keep the strip clean and free of oil or dust during installation. Once embedded, the strip remains dormant until water contact occurs, providing long-term, maintenance-free waterproofing for the life of the structure.
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