Vandex Cemelast is a two-component polymer modified, cementitious surface treatment. It consists of Vandex BB75 (dry component) and Vandex Cemelast Liquid (polymer component), When the two are mixed together to create Vandex Cemelast, areas that are subject to cracking and minor movement can be easily waterproofed. Tested to over 50 feet of hydrostatic pressure, Vandex Cemelast is suitable for horizontal and vertical/overhead uses. While resistant to water and moisture, Vandex Cemelast allows the structure to breathe by allowing the passage of vapor.