A two part hydraulic cement coating designed for dampproofing both above and below grade concrete and masonry. Special tobemorite gel chemistry yields bond strength which is as much as three times stronger than competitive products. It is excellent for use in controlling subgrade weeping and seepage in basements, tunnels, conduits and other situations where moderate hydrostatic water pressures are encountered. Hardens in on 15 minutes. Meets British Standards for applications requiring direct contact with potable water.