« BIBO » is added to mortars and white leads, mixing with the water of mixture. In all cases in which this product is used to adhere plasters or recasting, it is necessary to prepare the substrate by spreading a grout of « BIBO » as adhesive product. For the subsequent layer of mortar, plaster, recasting, the substrate must be prepared by spreading a grout of « BIBO » as adhesive product. For the subsequent layer of mortar, plaster, recasting or other, regardless of it contains or not « BIBO », the grout of « BIBO » must be applied and, once dried, it is essential to apply a second coat immediately before laying the next layer. This is an essential condition for achieving the adherence.