Bridge Center Bulb PVC Water Stopper

A **Center Bulb PVC Water Stopper** (also known as a PVC Water Bar or Water Seal) is a type of flexible PVC profile designed to prevent water leakage through concrete joints. It is used in concrete structures to stop water from seeping through expansion, contraction, and construction joints. The center bulb is a critical feature that enhances its ability to accommodate movement in the structure while maintaining a water-tight seal.

### Key Features:

- **Center Bulb**: This bulb-shaped section allows for expansion and contraction of the structure without compromising waterproofing. It absorbs movement due to settling, thermal expansion, or seismic activities.

- **PVC Material**: The stopper is made from flexible polyvinyl chloride (PVC), which provides high durability, resistance to chemicals, and flexibility to accommodate structural movement.

### Types of Joints Where It's Used:

1. **Expansion Joints**: Allows for movement between sections of concrete caused by thermal expansion or contraction.

2. **Contraction Joints**: Used where the concrete is expected to shrink and crack as it cures.

3. **Construction Joints**: Applied between two different stages of concrete placement in large structures.

### Applications:

- **Water Retaining Structures**: Used in dams, canals, swimming pools, water tanks, and reservoirs.

- **Underground Structures**: Applied in basements, tunnels, and retaining walls.

- **Bridges and Culverts**: Provides water sealing in bridge construction and underground culverts.

### Advantages:

- **Waterproofing**: Prevents water from passing through joints in concrete structures.

- **Flexibility**: Accommodates movement and pressure without cracking.

- **Chemical Resistance**: Resistant to most chemicals and environmental effects.

- **Durability**: Long-lasting and designed to handle both high-pressure and temperature variations.

PVC center bulb water stoppers are essential for ensuring the integrity of structures exposed to water or moisture, providing reliable protection against leaks and seepage.