24/07/2026
Swelling waterstop tape is a special waterproofing product that expands when it comes into contact with water, providing sealing in construction joints and pipe penetrations. By preventing water infiltration in concrete joints and pipe transitions, it helps structures achieve long-term durability and safety.
Swelling waterstop tape is used in concrete structures, especially in cold joints, construction joints and pipe penetration areas. When it comes into contact with water, it expands up to 2–3 times its original volume and completely fills the surrounding gap. This makes it an effective solution for narrow or complex areas where traditional waterstop systems cannot be easily applied.
Swelling waterstop tape is commonly used in:
Swelling waterstop tapes are generally produced using bentonite or polymer-based materials:
When exposed to water, bentonite transforms into a gel-like structure, expanding to fill gaps and block water passage.
Provide controlled expansion and offer high resistance against chemical exposure.
When water reaches the tape, it becomes activated, expands and seals the surrounding area to prevent leakage.
When it comes into contact with water, it expands and seals concrete joints and pipe penetration gaps, preventing water leakage.
It is used in foundation joints, curtain walls, tunnels, elevator pits, water tanks and pipe penetration areas.
It is generally installed before concrete pouring; however, it can also be used in certain repair applications after construction.
No. It only expands when it comes into direct contact with water and should be protected from unnecessary moisture exposure before installation.
Swelling waterstop tape provides a practical, reliable and effective waterproofing solution for both new construction projects and repair applications where water sealing performance is critical.
