SEBO De Macho is made of an oily substance, most likely kept at a sebum state, and is generously applied onto the surface of the skin where the scar is located. Generally, it’s recommended for scar types that are just darkened skin and not the ones that skin has regenerated (or something to that effect). As far as I remember, it causes the skin to lighten, making the skin tone even.
It’s best to keep in mind that the ointment is not a magical tool that will erase scars. What it does is to make it less prominent (for large-sized ones) and will cause the dark skin around scars to lighten. Though some scars will indeed be removed, though will only depend on its size and type and if application is done on a regular basis.