A composition(s) and method(s) for preparation of hydrophobic coating composition are described. The hydrophobic coating composition includes a formulation of alumina-silica based nano composite and a resin onto which the formulation is dispersed to form the hydrophobic coating composition. The formulation includes silica nano-particles derived from TetraEthoxySilane and HexaDecylTriMethoxySilane, ammonia as catalyst and aluminum iso propoxide as a precursor for synthesis of alumina and a resin onto which the formulation is dispersed to form the hydrophobic coating composition.