Six com. fluorescence penetrants used for nondestructive testing construction materials were studied for environmental impact and washability (removing time) as well as assessed for quality and purchase expenditure to identify the most efficient method for selection of the agents. The penetrant selected in fuzzy anal. hierarchy process was not optimal from cost-quality point of view. Therefore, the ranking list of penetrants was based on decision making coeffs. The evaluation method was recommended for practical use under industrial conditions.