Archaeological mortars are considered among the most important elements in any construction. The deterioration of this element represents a serious problem that faces restorators. In the current paper the behavior and different properties of lime mortars treated with some types of Praloid after submitting them to some cycles of artificial weathering is discussed. These cycles were carried out using a scientific exposure program similar to the deterioration factors dominant in Fatimide necropolis in Aswan (the study area). Salt containing water as is provided by domestic wastewater, aggressive effects of heat and UV radiation are provided by the solar radiation. The behavior of the studied mortars were evaluated by applying laboratory tests to select the best procedure for application in the archaeological sites particularly this study area. The results proved that our samples consist mainly of calcite with embedded quartz clastic grains, feldspars and traces of silicate minerals. Presence of some deterioration symptoms such as granular disintegrations, presence of some contamination layers covered the main components of mortar. In addition to existing types of salts are calcium, magnesium and sodium bicarbonate, sodium chloride, sodium and potassium sulphate. Also, the results prove that consolidant materials could be classified according to their positive roles as follows (samples treated with Paraloid B 82, B 72, B 48, B 44 and finally samples treated with Paraloid B 66.