E-Z Patch® 1 F.S. (Fast Set) White or Colored Pool Plaster Repair is a plaster mixture specifically designed for fast set underwater or above water (with water lowered) repairs. It is also the best product to use for fast repairs in cold weather or when painting plaster after repairing. If water is lowered to do repairs, the pool may be refilled after 4 hours. Swimming may be allowed the next day. Liquid Acrylic Bonder is not needed on this kit. Product contains special modified materials with pozzolans (siliceous volcanic ash) and polymers.