... .50kg and 25kg/barrel Product features:1. Super permeability, internal concrete permeable crystallization makes it resistant to breakage.2. Super " ... of ageing. service life is as long as the concrete.3. Resistant to frost heaving and thawing circulation, inhibiting ... Underground projects, 2.Metro, 3.Tunnels, 4.Pools 5.Concrete structures of water conservancy projects. Storage and Transportation: Keep ...