nt of 2-10 wt. % based on the total weight of the composition, and a solvent, in particular heptane, in an amount of 60-95 wt. % based on the total weight of the composition.In the composition, the mole ratio of all mercaptosilanes MS used in the composition to all the polysilanes PS used in the composition to all the aromatic secondary aminosilanes AS used in the composition to all the organotita