Perform an accurate cleaning to remove dirt, any parts that are peeling off, grease and other contaminants. Prime with our product « H 95 IMPRIMITURA » in case of very absorbent or floury surfaces, or our solvent - based product « PRIMER ALLA PLIOLITE ». In the case of new or old bituminous membranes, apply a coat of our water - based primer « BITUMPRIMER ».
The surface must be dry; the presence of excessive humidity inside the substrate, during solar radiation, can generate steam that causes the formation of bubbles and the subsequent detachment of the coating.