Nappa polyester to build waterproofing membrane as ARTIGUM and ARTIPUR. Improves resistance to punching pressure and structural movement. Unlike grid meshes, it has the ability to absorb the elastomer, integrating it when drying. Its elasticity facilitates adaptation to the support, saving unnecessary consumption and avoiding air pockets, for example between the joints of the tiles. Ideal to reinforce the meetings of the pavement with the walls. Apply the coating so that it is completely absorbed and without folds in the first layer.