Abstract: A universal tool for caulking windows with different types of glazing sealant.In order to achieve this aim the tool has as its main parts a handle and a caulking portion distally ending in a beak adjoining a channel on the side of the tool to be turned towards the window pane. In its part extending proximally from the beak the tool is formed with a hole to receive the glazing sealant. This hole extends from its proximal end in the part of the caulking portion adjacent to the handle to a position adjacent to the channel. The part of the tool including the beak, the channel and the distal end of the hole is made so as to have an elliptical outline when viewed in the proximal direction from the tip.