Flexlock G2TBULTRA004 Ultra G2 Rapid Set Onyx Black Sand 50 lbs - Ultra G2 Rapid Set Sand is made with a state-of-the-art manufacturing process. Specifically, calibrated sand is mixed with sophisticated intelligent polymers. This new generation of intelligent polymers neutralizes haze and dust. No blower is needed and the intelligent polymeric sand requires only one watering. This sand is recommended for a variety of uses including pool decks, patios, footpaths, driveways, parking spaces, pavements and more.