It can be applied on an old flat and adherent covering that is still in good state but near the end of its lifetime. Where there are old waterproofing systems, both with or without thermal insulation, which are affected by minimum infiltration due to a very few cracks that are clearly visible and easily repairable and that have not soaked, if not to a minor extent, the insulation panel, with several surface cracks which do not affect the thickness of the covering, but perfectly flat, dry and free from signs of tensioning, you can consider refurbishing using the single-layer flame-bonded MINERAL TECTENE RINOVA EP POLIESTERE (max. pitch 40%).