The quality of ECE FIX Crystallized Water Isolation Mortar has been registered with the reports obtained from the Concrete Material Labaratory of the Technical Researches and Quality control department of the General Directorate of State Hydraulic Works. In accordance with the water isolation material test results, the maximum water permeability of ECEFIX crystallized wtaer isolation mortar applied surfaces has been found as 41 mm, while the same was found 147 mm on replicate sapmles. This result gathered from the tests done with ECE FIX Crystallized Water Isolation mortar, which provides approximately four times better water impermeability than the average values, is the best quality measure up to date, of Crystallized Water Isolation Mortar material.