Abstract: A waterproofing or sealing surfacing for the facade of a building comprises an armature of fibrous material, such as a woven fabric or non-woven tissue which is either glued or pasted by a resin onto the facade of the building. It presents, on its outwardly facing surface, a discontinuous layer with a relief area in the form of drops of water, which layer comprises dry resin droplets adhering to the surface of the armature and defining between them zones which are not covered by these droplets. On this layer, a thin layer of plastics material constituting a protective film adheres to the discontinuous layer formed by the dry resin droplets and is adapted to be easily detached from this layer at the moment of application of the surface on its support or of the layer of finish on the armature.