Preparation of self-setting calcium hydroxide, recommended for direct and indirect pulp capping and for the isolation of the cavities under the fillings, cements, composites, and other materials. This product serves as a protective barrier between the dentin and pulp of a part, and the generators of the other acid materials, and promotes the formation of secondary dentin in contact with the pulp. it does not prevent the polymerization of acrylic and composite restorations. Product obtained by mixing the pastes A and B is radiopaque, self-sterile and hardens quickly. formulation gives very good leveling properties.