Concrete and reinforced concrete structures must always be built divided into sections, by forming joints – construction (daywork and isolation) joints and/or expansion (movement) joints. For sealing and waterproofing of the concrete structure, waterstops are installed in all of these necessary joints. The selection of the right waterstop material, its overall waterproofing concept, design and profiles are dependent on the specific structure, its exposure and the construction process. The functions of these waterstops are primarily to act as a waterproofing seal in the joint, plus to allow the two sections to move independently of each other – without restriction (free of tension). 

Waterstops are used for the waterproof sealing of construction and expansion joints against water penetration from percolating ground water and water under hydrostatic pressure, as well as for surface / end capping joints.