If the crack is fresh and poured neatly, gradually pressing on the crack on the other side, the crack is almost not visible. If the crack is dirty, bubbles will remain and will not completely disappear. Hardens in the sun. The bubble was enough on the crack that went on all the glass (from left to right stand) still remains. Somewhere it worked very well. Somewhere not very much. In the photo, the thin strip is a tape tape. Thick is the strip of which is covered by the filled crack (after it is frozen, removed, and the blade is cleaned of the residues)