Polyurea system comprises: (a) an isocyanate-functional prepolymer obtained by reacting aliphatic isocyanates with polyols having a number average molecular weight of >；= 400 g/mole and an average hydroxyl-functionality of 2-6； (b) an amino-functional aspartic acid ester compounds (I)； (c) optional organic fillers having a viscosity measured according to DIN 53019 at 23[deg] C in 10-6000 mPas； (d) optionally reaction product of (a) with (b) and/or (c)； and (e) water and/or tert-amine. Polyurea system comprises: (a) an isocyanate-functional prepolymer obtained by reacting aliphatic isocyanates with polyols having a number average molecular weight of >；= 400 g/mole and an average hydroxy-functionality of 2-6； (b) an amino-functional aspartic acid ester compounds of formula (X-[NH-CH(CH 2-COOR2)-COOR1] n) (I)； (c) optionally organic filler having a viscosity measured according to DIN 53019 at 23[deg] C in 10-6000 mPas； (d) optionally reaction product of (a) with (b) and/or (c)； and (e) water and/or tert-amine. X, R1, R2 : organic residue having no Zerewitinoff active hydrogen； and n : at least 2. An independent claim is included for a dosing system having two chambers for the polyurea system, where the component (a) is present in the first chamber and the components (b) and (e) and optionally (c) and (d) are present in the second chamber.
