Three component composition consisting of a) a polyol component comprising - at least one polyol P1a with an average molecular weight of 800 to 30'000 g/mol, whereby the polyol P1a is: a polyhydroxy-functional fat and/or a polyhydroxy-functional oil or a polyol obtained by chemical modification of natural fats and/or natural oils, and - at least one polyol P1b with an average molecular weight of 48 to 800 g/mol, and - at least one polyol P1c with an average molecular weight of 300 to 3000 g/mol, whereby the polyol P1c is selected from the group consisting of polyoxyethylenepolyol, polyoxypropylenepolyol and polyoxybutylenepolyol, preferably polyoxypropylenepolyol, and - water, whereby the at least one polyol P1b and the at least one polyol P1c represent individual structurally different polyols, and b) a polyisocyanate component comprising - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2.5, or - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2 and at least one polyol P2 with an amount of between 1 and 30%, based on the weight of said polyisocyanate component, wherein said MDI product and said polyol P2 have reacted at least partially, and c) a powder component comprising at least one hydraulic binder, preferably cement and/or calcined paper sludge; wherein component contains said polyol P1c with an amount of 0.2 to 8%, based on the total weight of component. a) a polyol component comprising - at least one polyol P1a with an average molecular weight of 800 to 30'000 g/mol, whereby the polyol P1a is: a polyhydroxy-functional fat and/or a polyhydroxy-functional oil or a polyol obtained by chemical modification of natural fats and/or natural oils, and - at least one polyol P1b with an average molecular weight of 48 to 800 g/mol, and - at least one polyol P1c with an average molecular weight of 300 to 3000 g/mol, whereby the polyol P1c is selected from the group consisting of polyoxyethylenepolyol, polyoxypropylenepolyol and polyoxybutylenepolyol, preferably polyoxypropylenepolyol, and - water, whereby the at least one polyol P1b and the at least one polyol P1c represent individual structurally different polyols, and - at least one polyol P1a with an average molecular weight of 800 to 30'000 g/mol, whereby the polyol P1a is: a polyhydroxy-functional fat and/or a polyhydroxy-functional oil or a polyol obtained by chemical modification of natural fats and/or natural oils, and a polyhydroxy-functional fat and/or a polyhydroxy-functional oil or a polyol obtained by chemical modification of natural fats and/or natural oils, and - at least one polyol P1b with an average molecular weight of 48 to 800 g/mol, and - at least one polyol P1c with an average molecular weight of 300 to 3000 g/mol, whereby the polyol P1c is selected from the group consisting of polyoxyethylenepolyol, polyoxypropylenepolyol and polyoxybutylenepolyol, preferably polyoxypropylenepolyol, and - water, whereby the at least one polyol P1b and the at least one polyol P1c represent individual structurally different polyols, and b) a polyisocyanate component comprising - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2.5, or - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2 and at least one polyol P2 with an amount of between 1 and 30%, based on the weight of said polyisocyanate component, wherein said MDI product and said polyol P2 have reacted at least partially, and - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2.5, or - a methylene diphenyl diisocyanate product with an average NCO functionality of at least 2 and at least one polyol P2 with an amount of between 1 and 30%, based on the weight of said polyisocyanate component, wherein said MDI product and said polyol P2 have reacted at least partially, and c) a powder component comprising at least one hydraulic binder, preferably cement and/or calcined paper sludge;