The products of the Pedrabianca line are made of pure hydrated lime powder obtained from the calcination at 900° C of the best Sardinian limestones and subsequent slaking of the calcium oxide, with the addition of natural stone giving it hydraulic properties. The plaster permeability to water vapour and the raw materials used in their preparation, do not alter the transpirability of the masonry, which remains an open and dynamic system, ensuring the balance with the surrounding environment and reducing the risk of degradation, 46 i.e. mould. The products of the Pedrabianca line are ideal for restoration and green building.