Suprasec 2332 Diphenylmethane diisocyanate based prepolymer Huntsman Polyurethane (PU) - Prepolymers >> Isocyanate >> MDI based Used for the formulation of adhesives, coatings and elastomers. Suprasec 2332 Low-functionality MDI based prepolymer. Used for a wide range of elastomer applications Low-functionality MDI based prepolymer. Used in the formulation of coatings.