The difference between rubber center bulb waterstop and external waterstop tape

Rubber center bulb waterstops and external waterstop strips have different looks and functions. They also have different functions and uses.

Appearance and Installation Location

rubber center bulb waterstop

The rubber center bulb waterstop is typically composed of a rubber strip and a steel plate. The concrete embeds the rubber strip, and it closely adheres to the concrete. This waterstop is mainly for concrete structures, like basements and water tanks.

The manufacturer makes the external adhesive waterstop from rubber. It has either a backing adhesive cloth or a self-adhesive backing. It can be directly adhered to the base surface. Workers place this waterstop directly on the concrete surface. They use it in expansion and settlement joints of underground structures.

Function and Application Scope

The rubber center bulb waterstop mainly prevents water leakage. It also offers great water resistance and aging resistance. It is suitable for concrete structures such as basements, water tanks, and tunnels.

The external adhesive waterstop stops water leaks. It also keeps out dust, mold, and pests. It’s good for roofs, walls, and floors. It also works well in humid areas like basements, bathrooms, and kitchens.

Material and Performance

The rubber center bulb waterstop is elastic and wears well. It effectively stops water from getting through.

The external adhesive waterstop also has good elasticity and wear resistance. It can stretch and compress under different loads. This creates a tight seal that stops leaks and seepage in construction parts. It also acts as a shock absorber and buffer.