The present invention relates to a composition for shirring artificial casings which allows conferring the casing with a high capacity to cling to the meat paste stuffed therein. The composition of the invention includes at least one heat curable polycationic resinous component, a polyolic component and water, wherein the water activity (aw) index has a value greater than or equal to 0.70. A casing impregnated by said composition, the meat product stuffed in said casing and the method for impregnating the casing with the composition of the invention is also contemplated.