Modern wind turbines are designed to have long blades to increase the power output. As a result, the outermost part of the turbine blades close to the tip travel at high speeds up to 100 m/s, causing severe erosion damage to the leading edge surface of the blades due to the impact of particles such as rain droplet, hail, sand and other debris. Erosion damage is even more profound for helicopter rotor blades, having much higher tip speeds up to 300 m/s. Although commercial erosion protective materials are available, their performances are not yet fully satisfactory, especially when operating in extreme environments under compounded effect of hydrolysis, rain erosion, sand erosion and solar irradiation. To address this technology gap, a novel polyurethane-based coating was developed that shows drastically enhanced erosion resistance against both sand particles and water droplets. The new coating demonstrates high mechanical strength and resilience and excellent stability against hydrolysis, heat and fluids.