TECMADRY^® ELAST is a two-component pre-dosed product which is based on special cements and synthetic resins in emulsion. Its special formulation provides the surfaces where it’s applied with an efficient waterproofing, as well as high protection against concrete carbonatation and diffusion of other aggresive agents for concrete (chlorides, pollutant gases, etc.) However, the product does not alter vapour exchange conditions of the support, thus allowing its natural transpiration.