HydroBlocker Tekatrak VB1 is an internal metal sealing tape coated on one side with a substance which binds with concrete and provides good sealing. It is used for sealing temporary construction joints on the basis of a “white tub” principle in order to prevent water-ingress from one side. It is particularly suitable when on one side of the joint there is not enough concrete or when the structure itself does not allow a PVC-element to be installed. Simple application. Joints of individual elements simply overlap.