Quidur DIP 02 Polyurethane prepolymer Merquinsa PU - Prepolymers >> Isocyanate ADHESIVE QUIDUR DIP 02 is a polyurethane prepolymer that is solvent- and plasticiser- free, with a free isocyanate (TDI) content lower than 0.1 %, and that is used as a binder for cork granules, for the production of composition-cork stoppers through pressure and heat treatments. Solvent- and plasticizer-free polyurethane prepolymer.