Fast-Curing 2K PU Sealants Utilizing Low Free TDI Trimer Crosslinkers: A Comprehensive Overview Introduction Polyurethane (PU) sealants have become indispensable in various industries, including construction, automotive, and aerospace, owing to their superior adhesion, flexibility, durability, and resistance to chemicals and weathering. Two-component (2K) PU sealants, in particular, offer enhanced performance and tailorability compared to their...