We report on the dynamic behavior of a polyurea-coated 6061 aluminum plate under hydro dynamic loading condition.The plates deflection was measured using ultra-fast stereoscopic photography,and analyzed using 3D-DIC(digital image correlation)technique.The residual deformation of the plate after several shocks was measured using conventional cameras and the DIC technique.The experimental results show the benefits of the polyurea coating,and clearly show that polyurea will better mitigate the shock if positioned on the side in contact with water.Preliminary numerical results are shown to shed some light on the experimental results.