BASF has developed a polyurethane coating specifically designed to improve the life of wind turbine blades, Relest Wind LEP. Wind turbines need to have a service life of 20 years in order to be economically efficient, according to BASF, and during that time their rotor blades are exposed to enormous stresses. At the blade tips, speeds can reach up to 300 kilometres per hour. Add to that the impacts of rain, hail, snow, sand and UV radiation. The coating can be applied under a wide range of climate conditions and that despite the elasticity of the coating it can be sanded, for example, for touch-up jobs.