Seismic Isolation Bearing, Hydrophilic Waterstop, Bridge Rubber Bearing manufacturer / supplier in China, offering Concrete Joint Hydrophilic Expansion Water Stop Bar/Water Stopper for Waterproofing Engineering Bentonite Rubber Water Stop Bar, 20mm * 25mm Bentonite Waterstop Swellable Expansion Rate 150%-300% Building Waterproof Material Hydrophilic Expansion Water Stop for Concrete Joints, China Manufacturer Good Quality Concrete Project Water Expanding Bar Hydrophilic Swellable100% 200% 300% Rubber Waterstop 10X20 Swelling Bar Rubber Water Stop and so on.