DL-75 is a TDI adduct polyisocyanate hardener for indoor 2K polyurethane wood and furniture coating formulations, with 75±2% solids, NCO 13.0±0.5% and free TDI ≤0.5%.

MF-55 is a TDI trimer polyisocyanate hardener supplied by Dongsen as a curing-agent / crosslinker raw material for 2K PU wood and furniture coatings, with confirmed high compatibility and a matte-finish direction.

MF-77 is a TDI trimer polyisocyanate hardener supplied by Dongsen as a raw-material crosslinker for interior wood and furniture coating formulations. It is positioned for high compatibility and gloss-finish applications.

HDX-960E is an aromatic TDI trimer polyisocyanate hardener used as a crosslinker in indoor 2K PU wood furniture coatings. It offers confirmed compatibility with acrylic resin systems and low free TDI monomer.