Joint Sealing in Tunnel Constructions

Cold and expansion joints are often affected by leaks during tunnel construction. In some cases, regrouting is recommended. Joint flanks must be first levelled and repaired with KOSTER Repair Mortar. The joint flanks must be sound, solid, and free of oil and grease. A backer rod is installed in the joint, and the flanks are primed with KOSTER FS Primer 2C. After the primer has dried, KOSTER Joint Sealant FS-V is applied with a caulking gun and is smoothed over.

In cases where the joint cannot be repaired, it is important to prevent penetrating water in order to keep the operational area dry. In such cases, KOSTER Joint Tapes are recommended.

1)      Adhesive

·         KB Pox Adhesive


2)      Joint Tape

·         Joint Tape 20/30


3)      Primer

·         FS Primer 2C


4)      Joint sealant

·         Joint Sealant FS-V



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