Sika®-2 Water Plug is used for the immediate sealing of severe water leaks in tunnels, subways, basements, inspection pits, vaults etc. before coating with a proprietary waterproofing system. Used as plug for penetrating water, Sika®-2 is a ready to use rapid setting leak stopping liquid which is mixed with ordinary Portland cement to produce a paste for rapid sealing against high water pressure infiltration.