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Custom Size Bentonite Waterstop Swelling Strip. High Swelling Capacity: Expands up to 400% volume to seal cracks and resist hydraulic pressure. Long Service Life: Durable for over 50 years, matching the concrete structure lifespan. Superior Elasticity: Vulcanized rubber adapts to settlement and thermal expansion without losing seal. Easy Installation: Lightweight, flexible, and easy to cut or splice with adhesive or nails. Multi-Functional Protection: Anti-static, heat insulation, sound-absorbing, and waterproof properties. High Production Capacity: Manufacturer produces 10,000 meters of waterbar daily. Global Export Experience: Exported to 25 countries with 15 years of R&D and manufacturing expertise.