ENVIROTAC consists of environmentally safe chemicals which works on the principles of nano technology. The acrylic co-polymer creates nano composites within the soil fabrics and modifies the soils micro-structures. This increases the interconnection between soil particles producing a homogeneous and isotropic material. The swelling behaviour of Envirotac coated soils is partially or totally eliminated due to the construction of nano filler which acts as hydrophobic material. Therefore, the treated soils exhibit increase in the unconfined compression strength, tensile and shear strength.