Abstract: Polymer powders redispersible in water in paving joint mortars, the paving jointing mortar having approximately 0.5% by weight or more, based on the paving joint dry mortar, of one or more mineral binders, as well as one or more additives and, if necessary, further components. The paving joint mortar can be introduced into a joint in powder form and subsequently watered, or the paving joint mortar can be mixed with water before introduction into the joint and added to the joint in paste form.