Multicrete Water Cut-Off Grout 60/90 is a hydraulic cement-based, non-shrink unsanded (concentrate) grout. This specially formulated grout contains a blend of anti-washout additives for high performance in areas with a water flow or fully submerged body of water. (Where water must be overcome.) The 60/90 component refers to the time it takes to set (60 or 90 minutes)