If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:2 t- K0 c" \& t# C: {" V, h* h
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(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot * x y2 s. L( g ?1 H9 Z: _+ h0 M( C- e( q% N; T2 T% b+ M
(2) To buy a round or square think-glass-disk with diameter or side length of 1 inch. If you can't find it, you can go 99 cents stores or dollartree to buy a large-clear-cloth-button at similar size. ! b5 Y+ W7 Z( G- A) C) L: }0 c9 @' j/ n
(3) Prepare Epoxy well, spread the paste to one side of the glass or button, attach it to the crack-upper-end from inside of windshield. Wait for 24 hrs. It'll be as solid as a rock and permanently stop the crack extension.