Two-part product based on a methylene diphenyl diisocyanate prepolymer and a polyol component has a reaction temperature below 130[deg]C, a short polymerization time, an expansion factor of no more than 5, an adhesive bond strength of more than 1 MPa after 0.5-5 hours, a viscosity below 800 mPa.s at 25[deg]C, and does crack due to internal forces during polymerization.
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