Abstract: The grinding device is for removing pipe renovation material from a pipe. The grinding device has at least one cutter, a body and fastening means for fastening the grinding device to a rotation shaft. The body and the at least one cutter are accomplished of a single piece for grinding pipe renovation material both in the forward direction of the grinding device and in a direction transverse to the forward direction. In addition, a system for removing pipe renovation material from the pipe and use of the grinding device for removing pipe renovation material from the pipe are disclosed.

Abstract: A connecting profile for binding water sealing paste to a structure at an edge of a zone to be protected by wet sealing. The connecting profile is adapted to be attached tightly to the structure and that the installed connecting profile comprises or forms together with the structure at least one groove which is adapted to receive water sealing paste applied on the connecting profile. Also provided is the structure, for example a floor drain, that has the connecting profile and a method for attaching water sealing paste on the connecting profile or on the structure.