This product contains special modified materials with pozzolans (siliceous volcanic ash) and polymers.S. E-Z Patch EZP-1796 10 lbs SGM Diamond Brite Series Ivory Quartz Plaster If water is lowered to do repairs, allow repair to set hard before swimming or before filling pool.SpecificationsColor: IvorySeries: SGM Diamond Brite SeriesWeight: 43 lbs 10 lbs Quartz Plaster Fast Set Pack of 4 E-Z Patch 10 F.