HydroBlocker Tekaswell is an expanding sealing tape used to seal temporary construction joints. It expands in contact with water and provides sealing. Dimensions available: 20mm × 5mm and 20mm × 10mm. It is used to seal a temporary construction joint by gluing Tekaswell N tape with Tekaswell paste in the middle of the joint. Tested to resist pressure up to 8 bars (80m of water pressure).