SIPU - Sprinkled Slip Blocker is made from crushed Leca gravel. SIPU package includes five 3 liter bags - easy to use; take the bag from the package, turn it so that the holes will be at the bottom, sprinkle the courtyard and corridors. SIPU does not harm the environment and will not scratch floors. In the spring you can sweep to lawn used SIPU, which fertilizes the grass. SIPU is ideal against slip, for example, for the elderly and the disabled - bag is light and is easy to use.