It is difficult to find out penetration depth of the considerable number of domestically-used penetrable waterproof-material-spread; and in quality control, there are many difficulties such as amount of water used, drying and moistening conditions of concrete on base-screed, and curing after the application. Therefore, the study seeks to evaluate efficacy of organic-inorganic-composite -surface-protective-for-concrete which is used to reinforce structure's durability such as preventing penetration of sea wind/water on concrete crust, damage by freezing weather and neutralization by reinforcing penetrability and improving construction site's constructability; it does so by applying it to concrete; the study also seek to determine its usability in construction site.