Gasket for a transition piece of a wind turbine and method for mounting such a gasket

A gasket for formfitting the bottom part of an upper structure of a wind turbine with one or more foundation piles, the gasket shaped as a hollow elongated body for surrounding at least a part of a pile structure, when mounted between the upper structure and the pile structure, such that the gasket stabilizes the position of the upper structure relative to the pile structure by absorbing compression, tension, and/or shear stresses occurring due to movements of the upper structure and/or the pile structure, wherein the gasket comprises a polyurethane obtained by mixing

• a) an organic polyisocyanate,
• b) polymeric compounds having at least two isocyanate-reactive hydrogen atoms comprising at least one polyetherol (b1) obtained by alkoxylation of a difunctional starter molecule and at least one polyetherol (b2) obtained by alkoxylation of a tri-functional starter molecule,
• c) 1 to 12 wt.-%, based on the total weight of components a) to c), of one or more chain extenders,
• d) a catalyst, and
• e) optionally fillers and/or polyurethane additives
• to give a reaction mixture and allowing the reaction mixture to cure.