Abstract: Desmodur Z4470 having isocyanate group was used to find optimum formulation of Polyurethane (PU) having self-healing property, with different desmophens as polyalcohol: desmophen 670 BA, desmophen 1800 and desmophen A 665 both in the present and absent of ethylene glycol as the chain extender agent. The obtained results showed that a hard polymer coating is obtained using desmophen A665 polyalcohol in the absence of any chain extender, however a corrosion resistant and transparent coating is obtained using desmophen 1800 and a ratio of NCO/OH = 2 for prepolymer formation stage and NCO/OH = 0.85 in polymerization stage by adding proper amount of ethylene glycol. This obtained PU shows the best self-healing properties.