I don't know, that looks like a crack on where the shoe is creasing. I don't think this product could really hold together creacking leather where it flexes. In, my experience once this happens it gradually gets worse. You can condition it and make it much less noticeable with products, but this, I think is here to stay. Regardless, I am ordering some anyway. I do know that Nick V. At VIP shoe service in Manhattan has taken shoes apart and patched them from the inside. The jobs come out looking really good, however I would imagine it costs a fortune and may change the shape and feel of the shoe if one doesn't have the original last. He said mostly people do it if there shoes have a special meaning to them, like their father's shoes and whatnot.