The invention relates to a metathesis crosslinkable binder composition comprising: i) at least one polymer comprising non-aromatic C=C double bonds, the polymer comprising an average of at least 4 unsaturated fatty acid residues per polymer chain, wherein at least one of the fatty acid residues has from C18 to C26 carbon atoms; and ii) at least a transition metal based metathesis catalyst according to formula (I) wherein L 1 is a neutral amine containing electron donor ligand; L 2 is an optional neutral electron donor ligand; X 1 , X 2 are independently from each other an anionic ligand; a, b in (X 1 ) a and (X 2 ) b of formula (I) are independently from each other an integer from 0 to 4; R is selected from the group consisting of linear or branched alkyl, cycloalkyl, aralkyl, aryl or their substituted equivalents; Ra is selected from the group consisting of hydrogen, linear or branched alkyl, cycloalkyl, aralkyl, aryl, or their substituted equivalents; M is a transition metal selected from the group consisting of Ruthenium (Ru), Manganese (Mn), Osmium (Os), Tungsten (W) and Molybdenum (Mo); wherein two or more of any of L 1 , L 2 , X 1 , X 2 , R and/or Ra are optionally covalently linked together to form one or more cyclic groups, and wherein two or more of any of L 1 , L 2 , X 1 , X 2 , R and/or Ra are optionally attached to a support.