Ris Plus is a primary sequestering additive suited to control the hardness of industrial waters in general, besides acting as a bio-releasing and dispersing agent against mixed films (organic and inorganic) deposited within the closed circuits of various kinds. Ris Plus has been formulated at a high concentration, in order to obtain a high sequestering action towards mineral salts (threshold effect), even in particularly difficult systems. Ris Plus contains no surfactant components and therefore it is able to reduce the polluting charge when discharging it besides not determining foaming phenomena in turbulent systems.